Log Message:
Update to 2.24

Upstream changes:
2.23 2015-06-08 rurban
   - HP-UX lddlflags fix by Merjin Brand (RT #105096)
     "ld: Unrecognized argument: -Wl,-E"
   - -Wformat fixes

2.24 2015-12-08 rurban
   - Silence gcc-5 optimizer warning (RT #105647)
     with internal BUILD_BZLIB=1
   - Improve kwalitee test