Add reglmatch(), a regexp version of match(), plus all/i variants. Fixes issue 904.

git-svn-id: https://pennmush.googlecode.com/svn/trunk@1846 ba372814-4f39-11de-9ad6-1127a62b9fcd
Rebuild help index.

git-svn-id: https://pennmush.googlecode.com/svn/trunk@1847 ba372814-4f39-11de-9ad6-1127a62b9fcd