[Dovecot] expire-tool fails if mail_location contains %h

Hi Timo,

not long ago you fixed a bug regarding the expansion of ~/ in mail_location that prevented expire-tool from working correctly. A similar problem exists if mail_location contains %h: expire-tool will use the wrong path to access the mailbox. After replacing %h with ~, expire-tool works as expected.

Why are there two variables for the home directory? Maybe the use of %h could be discouraged, sparing you some problems.

Regards, Thorsten