Update mezz-help.r
Update mezz-help.r

add back in _bugs_ and _chat_, and removed _docs_, and _demo_
kealist/ren-c,kealist/ren-c,kealist/ren-c,hostilefork/rebol,giuliolunati/ren-c,draegtun/ren-c,codebybrett/ren-c,giuliolunati/ren-c,giuliolunati/ren-c,hostilefork/rebol,codebybrett/ren-c,draegtun/ren-c,kealist/ren-c,kealist/ren-c,rgchris/ren-c,draegtun/ren-c,rgchris/ren-c,codebybrett/ren-c,kealist/ren-c,draegtun/ren-c,hostilefork/rebol,codebybrett/ren-c,hostilefork/rebol,rgchris/ren-c,draegtun/ren-c,hostilefork/rebol,hostilefork/rebol,rgchris/ren-c,codebybrett/ren-c,draegtun/ren-c,giuliolunati/ren-c,rgchris/ren-c,codebybrett/ren-c,giuliolunati/ren-c