[Pkg-postgresql-public] Bug#678858: does not work with Perl on squeeze

[Peter Eisentraut]

This change does not work with Perl on squeeze, because the included
Socket.pm module does not provide IN6ADDR_ANY.

This could be a problem during distribution upgrades, so at least a
dependency on some version of the perl package might be required.

It will also be annoying for backporting.  This could perhaps be
addressed by backporting the separate libsocket-perl and making that a
separate dependency.

Or perhaps the code could be changed to import this symbol only when
available?