[Dovecot] files missed from install

version: using dovecot 2.1.8 or 2.0.12

bug: installation - some files missed

details: dovecot-openssl.cnf and mkcert.sh are not copied from the src/doc folder to the installation doc folder on installation (make install) both are referred to in the documentation and are useful.

is there any chance of updating the build scripts to include these files? thanks,

Tim