Pigeonhole 0.4.20 source archive based on v. 0.4.20-rc1?

Hi,

looking at the source archive of pigeonhole 0.4.20 <https://pigeonhole.dovecot.org/releases/2.2/dovecot-2.2-pigeonhole-0.4.20.tar.gz> I noticed that the contained ChangeLog mentions v0.4.20.rc1 as first entry and pigeonhole-version.h defines git revision 7cd71ba as version where I'd expect 4a55e6c. This is probably no big deal. But since Makefile.in and install-sh also differ (see attached diff) from the patch contained in <http://xi.rename-it.nl/debian.new/pool/jessie-rc-auto/dovecot-2.2/dovecot_2.2.32-1~auto+1.debian.tar.xz> I thought I'd ask whether this is something without importance or something which should be changed.

-- Regards mks