Fixing problems with the recent security patch: When bison was not
installed, the patched gram.y file would not be used and the security
patch would be a no-op. Also, I've had reports of compilation errors
related to bison.
Since checking for the correct version of bison is hard and error
prone, I'm doing what the postgresql distribution does - patching the
yacc:ed .c file to get rid of the building dependency.
Bumping portrevision of -server.
Pointy hat to: me
Noticed by: Mike Harding and others
Approved by: seanc (implicit)