Fix header unfolding and some warnings

2.5

Update list of CHANGES, prepare for release

Really fix indexing of Mlmmj archives

Three releases in two days, we're on fire! (And need to build a test suite.)

Fix indexing of mlmmj format archives

2.3

Fix handling of mlmmj archive format by colobus-archive

Support for mlmmj, XTHREAD, and some bug fixes

A brief 20 years since the last release, this adds support for running on mlmmj archives, a new feature (XTHREAD), and pulls in some bug fixes from the fork used to run the perl.org infrastructure.

See the CHANGES file for more granular notes.