Testsuite hostname is now true local hostname.

Patch by Timo Sirainen.

Some environment items in the base specification are not (yet) applicable to Dovecot and are therefore not supported.

Patch by Timo Sirainen.

It is still a plugin, but no longer a separate package.

Unsetting the normal active script attribute would 'rescue' the non-link script and turn it into a symlink.

Tested whether this change breaks ManageSieve and basic dsync, but not much more.
More tests pending. If you use sync be careful with this commit.

Initializing multiple Sieve instances would hang.

It compiles, doesn't break normal ManageSieve operation, but it remains untested otherwise.

Patch by Timo Sirainen.

http://dovecot.org/patches/2.2/doveadm-sieve-plugin.diff
Made some small modifications.
This code should not interfere with normal ManageSieve operation, so I commit this right now without much testing.
The actual doveadm sieve plugin has a few open issues that need to be resolved still.

Passed senv->script_context rather than senv itself. Somehow the compiler fails to warn about this.

Used sieve_script_create instead of sieve_script_create_open.
Changed plugin debug output a bit as well.

Used errno instead of error variable.

Very useful to show that debugging is enabled and what version of pigeonhole is actually running.

Made normal compile error an info log item in the administrator log.

Forgot to increment count for the clone.

Setting skip_newline is useless when the connection is transfered to another process after successful login.