The existing ITRANS scheme did not support some characters and language quirks like 'chillu's. The Inscript method had errors. * lisp/language/ind-util.el (indian-mlm-base-table): Add archaic chars, Mozhi combos; cleanup. (indian-mlm-mozhi-table): New scheme Mozhi. * lisp/leim/quail/indian.el (inscript-mlm-keytable): Correct errors. Add Inscript chillus & zero-width chars, Mozhi scheme. * etc/NEWS: Mention the changes.