fmgr_info() must be called in the applyCacheContext.

Subsequent calls using the FmgrInfo structure may add more
sub elements to the info. This will be allocated in the same
memory context, the fmgr_info() call was made in. That
context must exist at least long enough as the FmgrInfo
call itself exists.
Add a regression test that ensures DDL is purging the apply cache.
Merge branch 'master' of ssh://git.postgresql.org/slony1-engine
Bug 286 PG 9.3 now takes two arguments on LookupExplicitNamespace

Add a configure check to determine if we have the 1 or 2 argument
version of LookupExplicitNamespace and pass the proper number
of arguments
Updating release notes for bug 286