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
add whoid usergroupset comment query to bug data fields
add AppendComment function
add CanChangeField function to check if a person can change a field
add display() for quick dumps of the bug
add Collision to check for midair collisions before changing a bug
added a stub function for changing a bug in the database
init_bug will now take either a userid or an e-mail address as a valid parameter