When I try to create a file link in "Comments" section, by typing "file://<file_path>", the link does not get created. It is shown as plain text.
But I am able to create hyperlinks using "http://<URL path>".
What do I need to do to create file links using "file://<file_path>" ?
I have found the solution which solves my purpose. Hope this helps somebody.
Bugzilla now, does not create auto-link for protocols which are not in its list of safe protocols.
Since I was trying to link a file, the 'file' protocol needs to be added to the list of safe protocols.
So, I added it to the list which is in the file 'Bugzilla/Constants.pm'.
Now, when I type 'file://<path to a file>', Bugzilla creates the auto-link.
(All this is done in the 'Comments' section).