Release 4.9

configure.ac: get ready to release 4.9

Signed-off-by: Serge Hallyn <[email protected]>

Release 4.8.1

Release 4.8

Tag 4.7

release 4.6

Tag 4.5

tag 4.2.1

Closes shadow-maint#35

That tag's been missing.

Going by Changelog and debian/changelog, 4.2.1 was tagged in
May 2014.  The next commit after this one is June 2014, so let's
plant a stake right here.

tag 4.4

tag 4.3.1