[PATCH] require xapian >= 1.2.6

[David Bremner]

David Bremner <david at tethera.net> writes:

> It seems that no-one tried to compile without Xapian compact support
> since March of 2015, since that's when I introduced a syntax error in
> that branch of the ifdef.
>
> Given the choice of maintaining this underused branch of code, or
> bumping the Xapian dependency to a version from 2011, it seems
> reasonable to do the latter.

pushed to release and master

d