Author: Petr Skoda
MDL-30779 add port and socket to dbtansfer tool
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c2ca1a3793785c1d75120aa6f9c2076db0bba32d
http://github.com/moodle/moodle/commit/c2ca1a3793785c1d75120aa6f9c2076db0bba32d
+ 2.2 en [dbport,core_install]