[Dovecot] Changed URL of the Sieve Mercurial repository.

Hi,

I've changed the name of the Sieve Mercurial repository form dovecot-libsieve to dovecot-1.2-sieve, to signify the Dovecot version it applies to. The URL thus looks as follows:

http://hg.rename-it.nl/dovecot-1.2-sieve

Note that there are already dovecot-2.0-sieve and dovecot-2.0-managesieve repositories, but these are still somewhat broken in multiple ways and I wouldn't call these ready for testing yet.

Regards,

-- Stephan Bosch stephan@rename-it.nl