doc: typo fixes.

Author: willmafh

lib/ngx/ssl.md

@@ -270,7 +270,7 @@ server_port
 **context:** *any*
 
 Returns the server port. Returns `nil`
-when server dont have a port.
+when the server does not have a port.
 
 In case of failures, it returns `nil` *and* a string describing the error.
 

lib/ngx/ssl/clienthello.md

@@ -72,7 +72,7 @@ Description
 
 This Lua module provides API functions for post-processing SSL client hello message for NGINX downstream connections.
 
-It must to be used in the contexts [ssl_client_hello_by_lua*](https://github.com/openresty/lua-nginx-module/#ssl_client_hello_by_lua_block).
+It must be used in the context [ssl_client_hello_by_lua*](https://github.com/openresty/lua-nginx-module/#ssl_client_hello_by_lua_block).
 
 This Lua API is particularly useful for dynamically setting the SSL protocols according to the SNI.
 

lib/ngx/ssl/proxysslverify.md

@@ -64,7 +64,7 @@ Description
 
 This Lua module provides API functions for post-processing SSL server certificate message for NGINX upstream connections.
 
-It must to be used in the contexts [proxy_ssl_verify_by_lua*](https://github.com/openresty/lua-nginx-module/#proxy_ssl_verify_by_lua_block).
+It must be used in the context [proxy_ssl_verify_by_lua*](https://github.com/openresty/lua-nginx-module/#proxy_ssl_verify_by_lua_block).
 
 This directive runs user Lua code when Nginx is about to post-process the SSL server certificate message for the upstream SSL (https) connections.