Add phpbb_version_compare() wrapper for version_compare()

[23:26:37] <nickvergessen> can someone confirm var_dump(version_compare('1.1.0-A2', '1.1.0-B1')); == 1 and var_dump(version_compare('1.1.0-a2', '1.1.0-b1')); == -1
[23:28:03] <igorw> yep
[23:28:11] <nickvergessen> stupid
[23:31:26] <bantu> that's interessting
[23:31:37] <bantu> *interesting
[23:31:46] <bantu> and is the reason why we have strtolower() in our checks
[23:32:44] <bantu> hmm
[23:32:57] <bantu> maybe we should have phpbb_version_compare() as a wrapper with proper documentation
[23:33:09] <bantu> such tiny things are rather annoying
[23:33:31] <naderman> bantu: create a ticket so we don't forget?