Postgresql docs fragments 2 (#55363)

* Postgres to use docsfragments
* Postgres to use docsfragments: redefined options in postgresql_user

lib/ansible/modules/database/postgresql/postgresql_membership.py

@@ -28,7 +28,7 @@ description:
 - 2) grant them desired privileges by M(postgresql_privs) module
   U(https://docs.ansible.com/ansible/latest/modules/postgresql_privs_module.html)
 - 3) add desired PostgreSQL users to the new group (groups) by this module
-version_added: "2.8"
+version_added: '2.8'
 options:
   groups:
     description:
@@ -67,18 +67,6 @@ options:
     type: str
     aliases:
     - login_db
-  port:
-    description:
-    - Database port to connect.
-    type: int
-    default: 5432
-    aliases:
-    - login_port
-  login_user:
-    description:
-    - User (role) used to authenticate with PostgreSQL.
-    type: str
-    default: postgres
   session_role:
     description:
     - Switch to session_role after connecting.
@@ -86,34 +74,6 @@ options:
     - Permissions checking for SQL commands is carried out as though
       the session_role were the one that had logged in originally.
     type: str
-  login_password:
-    description:
-    - Password used to authenticate with PostgreSQL.
-    type: str
-  login_host:
-    description:
-    - Host running PostgreSQL.
-    type: str
-  login_unix_socket:
-    description:
-    - Path to a Unix domain socket for local connections.
-    type: str
-  ssl_mode:
-    description:
-    - Determines whether or with what priority a secure SSL TCP/IP connection
-      will be negotiated with the server.
-    - See U(https://www.postgresql.org/docs/current/static/libpq-ssl.html) for
-      more information on the modes.
-    - Default of C(prefer) matches libpq default.
-    type: str
-    default: prefer
-    choices: [ allow, disable, prefer, require, verify-ca, verify-full ]
-  ca_cert:
-    description:
-      - Specifies the name of a file containing SSL certificate authority (CA) certificate(s).
-      - If the file exists, the server's certificate will be verified to be signed by one of these authorities.
-    type: str
-    aliases: [ ssl_rootcert ]
 notes:
 - The default authentication assumes that you are either logging in as or
   sudo'ing to the postgres account on the host.
@@ -128,6 +88,7 @@ notes:
 requirements: [ psycopg2 ]
 author:
 - Andrew Klychkov (@Andersson007)
+extends_documentation_fragment: postgres
 '''
 
 EXAMPLES = r'''