component/postgresql: v↑ postgresql92 (9.2.17)

Compared to 9.2.16 postgresql 9.2.17 is a bugfix release:

    https://www.postgresql.org/docs/9.2/static/release-9-2-17.html

component/postgresql/buildout.cfg

@@ -33,5 +33,5 @@ environment =
 
 [postgresql92]
 <= postgresql-common
-url = http://ftp.postgresql.org/pub/source/v9.2.16/postgresql-9.2.16.tar.bz2
-md5sum = a6ced0ccd4ce3279acfef9bac16a95ee
+url = http://ftp.postgresql.org/pub/source/v9.2.17/postgresql-9.2.17.tar.bz2
+md5sum = a75d4a82eae1edda04eda2e60656e74c