Fix LDAP Extended Query example.

The old one was not valid LDAP filter syntax.
Improve Authentication Containers examples.

* The first example was wrong (cf. ldap_backed() in auth.inc which
  looks for a DC= part to determine a full DN.
* The second example now show the realtive DNs.
Don't gettext() the example strings.

They must not be translated.
clone pfsense_ng theme
update css to fit full screen
update loader.js - add jquery to display additional column button and create/delete columns
change css & jquery to allow for multiple columns for themes ending in _fs
Merge pull request #695 from N0YB/Advanced_DHCP_Client_Options

Remove errant double quote.
Remove duplicated line that makes dhcp6c not run correctly
Add group_ports()
Add a new alias type, URLs containing Ports
Resolves #2910. Make apinger write its status file just after starting so that thing work as expected
Add an option to check certificate for https URL aliases
Create a function to download a file using curl
Remove useless code
Use download_file() and check ssl certificates
Process zipped aliases list
Fix set/unset of checkaliasesurlcert
Fix whitespaces
Remove extra { wrongly added on last commit