Add "Windows ME" operating system and a comment about how to add new os's (et al) to an already installed system

Fixed links off of 'Most doomed' reports to only list bugs that match the product we're reporting about.

original bug found by timeless@bemail.org

If bugs with an invalid product/component are found, provide a link to bring up the list of invalid bugs.

or milestone". thanks to dave@intrec.com (Dave Miller) for the patch

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

contributed by mhamby@logicon.com

Patches and work contributed by dave@intrec.com (Dave Miller).
Some cleanup work needs to be done with regards to permissions and bit-twiddling
see other bugs that are dependent on 25010 for details.

contributed by dave@intrec.com (Dave Miller)

use background delivery instead of defered so mail is delivered sooner and bug moving process goes faster.

Separate viewbugactivityformatforprinting with a vertical bar so the two links don't run together into one incomprehensible sentence

experimental: Not part of normal bugzilla distibution. Bug.pm creates a bug object and provides methods for getting and setting attributes and for printing out the bug as xml. xml.cgi prompts for a list of bugs and displays the list as html. xml.cgi replaces export_bug.cgi