common: polish COM_GetExtension
common: fix Q_stricmp
common: rewrite Info_ValueForKey
Merge branch 'master' of github.com:FenixXx/ioq3-for-UrbanTerror-4 into qcommon
Merge branch 'master' of github.com:FenixXx/ioq3-for-UrbanTerror-4 into qcommon
common: Q_strempty utility function to replace !strlen(s) like function calls
common: refactor info string code
common: rewrite and comment Info_Validate
Merge branch 'master' into qcommon
Merge branch 'qcommon'