bug22017: fix keep-alive timeout header

As keep-alive timeout, the server used to send
wserver-read-request-timeout back to the client where it should have
been wserver-header-read-timeout.

Bumped version. Updated defpatch forms for 8.2 and 9.0.

Change-Id: Ife9bbdf57802cc1f828381d8c8f8935d0b8e1abf