man-db 2.7.0

Upgrading from previous versions:
---------------------------------

For the first time since version 2.4.0, the database format has
changed slightly, so you will need to run 'mandb --create' after
installing the new version to rebuild your databases from scratch.
(Distribution packages should do this automatically for system
databases.)

Fixes:
------

o lexgrog now filters terminal escape sequences out of cat pages
  before trying to parse them.

o Tools that consider the terminal line length now prioritise the
  COLUMNS environment variable above the TIOCGWINSZ ioctl.

o Manpath elements are no longer canonicalised before being inserted
  into the search path; this caused the use of incorrect catpaths in
  some cases. This was broken by the LANGUAGE-handling fixes in
  2.5.4.

Improvements:
-------------

o Ship a systemd tmpfiles snippet to clean up old cat files after a
  week.

o The modification time of manual databases is now simply stored in
  the mtime of the database files themselves, rather than using a
  special row. This makes databases reproducible between
  otherwise-identical installations, as long as the underlying
  database has predictable behaviour. As a bonus, man-db now uses
  high-precision timestamps to determine whether it needs to update
  databases.

o Timestamps of manual pages are also now stored in the database
  with high precision and compared accordingly.

o Files are now ordered by first physical extent before reading
  them, for substantial performance improvements in operations such
  as mandb and 'man -K'.

o 'man -H' shows a better error message if no browser is configured.

o zsoelim is now installed in $pkglibexecdir, to avoid clashes with
  other packages.