Do not chmod +s chvt: instead, rely on sudo

The SUID flag may be lost on update, and relying on sudo is
slightly more secure.

We create a file in /etc/sudoers.d/ : these files are sourced by
default since sudo 1.7.2p1-1 (Ubuntu 10.04 lucid, Debian squeeze).

Fixes #723.
Update edit-chroot

Add 'a' and 'l' options to optionally operate on all chroots and display croutonversion details.
Update main.sh

Display valid chroot names when a chroot with the release name cannot be found.
Tweaked edit-chroot

Moved 'set $@' logic earlier in script so it gets run sooner.
Added option to specify '-l' twice in preparation for ENCRYPTED chroot logic.
Accommodate encrypted chroots

Added logic to accommodate encrypted chroots when specifying the '-ll' option.
Added output for name validation

When name validation fails, added output of valid chroot names.
Tweaked to set all chroots

Removed check for chroot names entered when the '-a' option is specified.
Updated edit-chroot per line notes

Changed script to comply with notes from @dnschneid - hopefully. :)
Testing results will follow.
Update main.sh per line notes

Changed script to comply with notes from @dnschneid - hopefully. :)
Testing results will follow.
Update edit-chroot per more line notes

Changed script to comply with additional notes from @dnschneid - hopefully. :)
Testing results will follow.
Update main.sh per more line notes

Tweaked error output message.
Update edit-chroot per line notes

Changes per line notes from @dnschneid.
Update edit-chroot

Tweaked script per latest lines notes by @dnschneid.
Update -edit-chroot

Initialized GETVERSION.
Update edit-chroot

Updated per latest line notes from @dnschneid
Update edit-chroot

Incorporate lates notes from @dnschneid pertaining to code simplification.
Update edit-chroot per line note from @drinkcat

Changed local variable name to lower case.
Update edit-chroot

Updated to add missing 'then' on line 101
Tweak edit-chroot

Tweaked line 268 to remove inadvertent error output redirection.
Update 12-edit-chroot

Added tests for patch-1 'Display chroot names and details'.