Also fixes seeing bugs in the buglist (bug 95024), dependancy lists,
tooltips, duplicates, and everywhere else I could see which checked group
bugs.groupset == 0.

Also fxed bug 101560, by clearing BASH_ENV

r=myk,justdave

Patch by Gervase Markham <gerv@mozilla.org>
r= justdave@syndicomm.com

Patch by Gervase Markham <gervase.markham@univ.ox.ac.au>
r= justdave@syndicomm.com

Bullshit checkin to add the fact that the previous changes also include the final fix for bug 72721.  I am a buckethead

Fix for bug 72721 (duplicates.cgi performs poorly with lots of bugs) and bug 69054 (DB_File not portable): dependence on DB_File removed, now uses AnyDBM_File which comes standard with Perl.  Duplicates.cgi now runs its queries against the shadow database if it's available, among many other improvements.
Patch by gervase.markham@univ.ox.ac.uk (Gervase Markham)
r= justdave

Checking in Jake's <jake@acutex.net> interim patches from bug 30694. Bugzilla was showing bug summaries to everyone, even if they didn't have permission to view the bug. Jake's quick solution is to not display the bug at all if it is in a group no matter who is viewing it. The correct solution would be display the  summary if the viewer had the proper permissions.

Patch from Jake <jake@acutex.net> for bugs 22041 and 25693 which had the same problem. HTML meta characters in the summary were not being quoted before being printed to html.