UTF-8 fix support in modular package

Because of building the RSyslog packages for v7 and v8 with modular database support (especially PostgreSQL) I think it's very important to provide the user a package for adding UTF-8 fix module.
Nearly everybody may run in problems with wrong encoded messages when building a central log server with database backend.

For more information visit: http://www.rsyslog.com/doc/mmutf8fix.html

Another idea may be the building of more modules which are disabled by default in the configure script and providing them in single packages.