Releasing 4.6

Changelog:

• Newgrp: avoid unnecessary lookups
• Make language less binary
• Add error when turning off man switch
• Spelling fixes
• Make userdel work with -R
• newgidmap: enforce setgroups=deny if self-mapping a group
• Norwegian bokmål translation
• pwck: prevent crash by not passing O_CREAT
• WITH_TCB fixes from Mandriva
• Fix pwconv and grpconv entry skips
• Fix -- slurping in su
• add --prefix option
• Import new Dutch translations.
• Expand error codes for groupmod.