Siddhesh,
Would you be opposed to moving all ChaneLogs from 2013 and earlier into a ChangeLog.old file, thus pruning the %changelog section in the glibc.spec file?
I can't see anyone using this actively in the rpm, but leaving it in a checked in file e.g. ChangeLog means we can look at it later. It solves the onerous problem that no matter what you search for in the file you're bound to find that word or text in the ChangeLog and that's getting annoying and old.
If nobody objects I'll prune the glibc.spec file and move the old data into a ChangeLog.old file.
Cheers, Carlos.