Correct 'person/<userid>/token' post method in apidocs

The post method does not use the 'cmd' parameter.

The 'project' is only used in combination with the 'package'.
This action will never create a token for a specific project, only for a package.

docs/api/api/api.txt

@@ -165,9 +165,8 @@ POST /person/<userid>/token
   Create a new authentication token for this user. It may be limited for a specific package
   via optional project&package parameters.
 
-  cmd: create
-  project: create a token for a specific project
-  package: create a token for a specific package
+  project: together with package, used to create a token for a specific package
+  package: together with project, used to create a token for a specific package
   operation: runservice(default), rebuild, release
 
 XmlResult: status