Make PUT and DELETE consistent for _mapping, _alias and _warmer

See issue elastic#4071

PUT options for _mapping:

Single type can now be added with

`[PUT|POST] {index|_all|*|regex|blank}/[_mapping|_mappings]/type`

and

`[PUT|POST] {index|_all|*|regex|blank}/type/[_mapping|_mappings]`

PUT options for _warmer:

PUT with a single warmer can now be done with

`[PUT|POST] {index|_all|*|prefix*|blank}/{type|_all|*|prefix*|blank}/[_warmer|_warmers]/warmer_name`

PUT options for _alias:

Single alias can now be PUT with

`[PUT|POST] {index|_all|*|prefix*|blank}/[_alias|_aliases]/alias`

DELETE options _mapping:

Several mappings can be deleted at once by defining several indices and types with

`[DELETE] /{index}/{type}`

`[DELETE] /{index}/{type}/_mapping`

`[DELETE] /{index}/_mapping/{type}`

where

`index= * | _all | glob pattern | name1, name2, …`

`type= * | _all | glob pattern | name1, name2, …`

Alternatively, the keyword `_mapings` can be used.

DELETE options for  _warmer:

Several warmers can be deleted at once by defining several indices and names with

`[DELETE] /{index}/_warmer/{type}`

where

`index= * | _all | glob pattern | name1, name2, …`

`type= * | _all | glob pattern | name1, name2, …`

Alternatively, the keyword `_warmers` can be used.

DELETE options for _alias:

Several aliases can be deleted at once by defining several indices and names with

`[DELETE] /{index}/_alias/{type}`

where

`index= * | _all | glob pattern | name1, name2, …`

`type= * | _all | glob pattern | name1, name2, …`

Alternatively, the keyword `_aliases` can be used.

docs/reference/indices/aliases.asciidoc

@@ -153,17 +153,22 @@ curl -XGET 'http://localhost:9200/alias2/_search?q=user:kimchy&routing=2,3'
 
 [float]
 [[alias-adding]]
-=== Add a single index alias
+=== Add a single alias
 
-There is also an api to add a single index alias, with options: 
+An alias can also be added with the endpoint
+
+`PUT /{index}/_alias/{name}`
+
+
+where
 
 [horizontal]
-`index`::   The index to alias refers to. This is a required option. 
-`alias`::   The name of the alias. This is a required option. 
+`index`::   The index to alias refers to. Can be any of `blank | * | _all | glob pattern | name1, name2, …` 
+`name`::   The name of the alias. This is a required option. 
 `routing`:: An optional routing that can be associated with an alias. 
 `filter`::  An optional filter that can be associated with an alias.
 
-The rest endpoint is: `/{index}/_alias/{alias}`.
+You can also use the plural `_aliases`.
 
 [float]
 ==== Examples:
@@ -191,16 +196,18 @@ curl -XPUT 'localhost:9200/users/_alias/user_12' -d '{
 
 [float]
 [[deleting]]
-=== Delete a single index alias
+=== Delete aliases
+
+
+The rest endpoint is: `/{index}/_alias/{name}`
 
-Th API to delete a single index alias, has options: 
+where
 
 [horizontal]
-`index`:: The index the alias is in, the needs to be deleted. This is
-          a required option. 
-`alias`:: The name of the alias to delete. This is a required option.
+`index`::  `* | _all | glob pattern | name1, name2, …` 
+`name`::  `* | _all | glob pattern | name1, name2, …` 
 
-The rest endpoint is: `/{index}/_alias/{alias}`. Example:
+Alternatively you can use the plural `_aliases`. Example:
 
 [source,js]
 --------------------------------------------------

docs/reference/indices/delete-mapping.asciidoc

@@ -1,8 +1,25 @@
 [[indices-delete-mapping]]
 == Delete Mapping
 
-Allow to delete a mapping (type) along with its data. The REST endpoint
-is `/{index}/{type}` with `DELETE` method.
+Allow to delete a mapping (type) along with its data. The REST endpoints are
+
+[source,js]
+--------------------------------------------------
+
+[DELETE] /{index}/{type}        
+    
+[DELETE] /{index}/{type}/_mapping      
+
+[DELETE] /{index}/_mapping/{type}  
+
+--------------------------------------------------
+
+where
+
+[horizontal]
+
+`index`::  `* | _all | glob pattern | name1, name2, …` 
+`type`::  `* | _all | glob pattern | name1, name2, …` 
 
 Note, most times, it make more sense to reindex the data into a fresh
 index compared to delete large chunks of it.

docs/reference/indices/put-mapping.asciidoc

@@ -59,3 +59,25 @@ $ curl -XPUT 'http://localhost:9200/kimchy,elasticsearch/tweet/_mapping' -d '
 }
 '
 --------------------------------------------------
+
+All options:
+
+[source,js]
+--------------------------------------------------
+
+PUT /{index}/_mapping/{type}        
+         
+
+--------------------------------------------------
+
+
+where
+
+[horizontal]
+`{index}`:: `blank | * | _all | glob pattern | name1, name2, …`
+
+`{type}`:: Name of the type to add. Must be the name of the type defined in the body.
+
+
+Instead of `_mapping` you can also use the plural `_mappings`.
+The uri `PUT /{index}/{type}/_mapping` is still supported for backwardscompatibility.  

docs/reference/indices/warmers.asciidoc

@@ -112,25 +112,55 @@ curl -XPUT localhost:9200/test/type1/_warmer/warmer_1 -d '{
 }'
 --------------------------------------------------
 
+All options:
+
+[source,js]
+--------------------------------------------------
+
+PUT _warmer/{warmer_name}        
+
+PUT /{index}/_warmer/{warmer_name}  
+    
+PUT /{index}/{type}/_warmer/{warmer_name}        
+
+--------------------------------------------------
+
+
+where
+
+[horizontal]
+`{index}`:: `* | _all | glob pattern | name1, name2, …`
+
+`{type}`:: `* | _all | glob pattern | name1, name2, …`
+
+Instead of `_warmer` you can also use the plural `_warmers`.
+
+
+
 [float]
 [[removing]]
-=== Delete Warmer
+=== Delete Warmers
+
+Warmers can be deleted using the following endpoint:
+
 
-Removing a warmer can be done against an index (or alias / indices)
-based on its name. The provided name can be a simple wildcard expression
-or omitted to remove all warmers. Some samples:
 
 [source,js]
 --------------------------------------------------
-# delete warmer named warmer_1 on test index
-curl -XDELETE localhost:9200/test/_warmer/warmer_1 
 
-# delete all warmers that start with warm on test index
-curl -XDELETE localhost:9200/test/_warmer/warm* 
-
-# delete all warmers for test index
-curl -XDELETE localhost:9200/test/_warmer/
+[DELETE] /{index}/_warmer/{name}  
+          
 --------------------------------------------------
+
+
+where
+
+[horizontal]
+`{index}`:: `* | _all | glob pattern | name1, name2, …`
+
+`{name}`:: `* | _all | glob pattern | name1, name2, …`
+
+Instead of `_warmer` you can also use the plural `_warmers`.
 
 [float]
 [[warmer-retrieving]]

rest-api-spec/api/indices.delete_alias.json

@@ -4,7 +4,7 @@
     "methods": ["DELETE"],
     "url": {
       "path": "/{index}/_alias/{name}",
-      "paths": ["/{index}/_alias/{name}"],
+      "paths": ["/{index}/_alias/{name}", "/{index}/_aliases/{name}"],
       "parts": {
         "index": {
           "type" : "string",

rest-api-spec/api/indices.delete_mapping.json

@@ -4,7 +4,7 @@
     "methods": ["DELETE"],
     "url": {
       "path": "/{index}/{type}/_mapping",
-      "paths": ["/{index}/{type}/_mapping", "/{index}/{type}"],
+      "paths": ["/{index}/{type}/_mapping", "/{index}/{type}", "/{index}/_mapping/{type}", "/{index}/{type}/_mappings", "/{index}/_mappings/{type}"],
       "parts": {
         "index": {
           "type" : "list",

rest-api-spec/api/indices.delete_warmer.json

@@ -3,8 +3,8 @@
     "documentation": "http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-warmers.html",
     "methods": ["DELETE"],
     "url": {
-      "path": "/{index}/_warmer",
-      "paths": ["/{index}/_warmer", "/{index}/_warmer/{name}", "/{index}/{type}/_warmer/{name}"],
+      "path": "/{index}/_warmer/{name}",
+      "paths": ["/{index}/_warmer", "/{index}/_warmer/{name}", "/{index}/_warmers", "/{index}/_warmers/{name}"],
       "parts": {
         "index": {
           "type" : "list",

rest-api-spec/api/indices.put_alias.json

@@ -1,10 +1,10 @@
 {
   "indices.put_alias": {
     "documentation": "http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-aliases.html",
-    "methods": ["PUT"],
+    "methods": ["PUT", "POST"],
     "url": {
       "path": "/{index}/_alias/{name}",
-      "paths": ["/{index}/_alias/{name}", "/_alias/{name}", "/{index}/_alias", "/_alias"],
+      "paths": ["/{index}/_alias/{name}", "/_alias/{name}", "/{index}/_aliases/{name}", "/_aliases/{name}"],
       "parts": {
         "index": {
           "type" : "string",

rest-api-spec/api/indices.put_mapping.json

@@ -4,11 +4,11 @@
     "methods": ["PUT", "POST"],
     "url": {
       "path": "/{index}/{type}/_mapping",
-      "paths": ["/{index}/{type}/_mapping"],
+      "paths": ["/{index}/{type}/_mapping", "/{index}/_mapping/{type}", "/_mapping/{type}", "/{index}/{type}/_mappings", "/{index}/_mappings/{type}", "/_mappings/{type}"],
       "parts": {
         "index": {
           "type" : "list",
-          "required" : true,
+          "required" : false,
           "description" : "A comma-separated list of index names; use `_all` to perform the operation on all indices"
         },
         "type": {

rest-api-spec/api/indices.put_warmer.json

@@ -1,10 +1,10 @@
 {
   "indices.put_warmer": {
     "documentation": "http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-warmers.html",
-    "methods": ["PUT"],
+    "methods": ["PUT", "POST"],
     "url": {
       "path": "/{index}/_warmer/{name}",
-      "paths": ["/{index}/_warmer/{name}", "/{index}/{type}/_warmer/{name}"],
+      "paths": ["/_warmer/{name}", "/{index}/_warmer/{name}", "/{index}/{type}/_warmer/{name}", "/_warmers/{name}", "/{index}/_warmers/{name}", "/{index}/{type}/_warmers/{name}"],
       "parts": {
         "index": {
           "type" : "list",