Merge pull request #406 from jimi1283/master

Changed F18 test to the official release
(issue#407) Enable authn_passthrough for Cobbler Web

There is currently no support for kerberos single sign-on in cobbler web.
This patch allows apache or another web server to set the REMOTE_USER variable which
will be used as the authenticated user for cobbler API authorization calls
Merge pull request #408 from jjulien/issue407

(issue#407) Enable authn_passthrough for Cobbler Web
Fixed issue with MAC address verification

- Removed errant ':' systems from the last two octet matches
- Added checks that the string does not start or end with extra characters
Merge pull request #409 from ahamilton55/fix_mac_address_verification

Fixed issue with MAC address verification
Fixing a few goofs from ac5de466
Merge branch 'master' of git://github.com/cobbler/cobbler
Refactor function cobbler.utils.is_mac

Use a precompiled and faster regular expression and add more tests.
timeit with 64M iterations: 48.32 versus 42.38 seconds.
Merge pull request #412 from ciupicri/master-mac-regex

Refactor function cobbler.utils.is_mac
Speedup function cobbler.utils.is_mac

Use both lower case and upper case hexadecimal digits in the regex
instead of using the re.IGNORECASE option. Also add more tests.
timeit with 64M iterations: 42.78 versus 39.74 seconds.
Merge pull request #413 from ciupicri/master-mac-regex

Speedup function cobbler.utils.is_mac
FEATURE - adding the ability to rename interfaces on the CLI
FEATURE - adding interface rename to the web ui
Merge pull request #416 from jimi1283/issue_415

Adding interface renaming
Fixing utils, CX exceptions should be raised, not returned