Remove ahbl as it's being winded down

http://ahbl.org/content/changes-ahbl

Fixes #232

cgit dependency missing

fixes #156

fixes #156 by adding the -L flag, as suggested by @ventolin

Only install Tarsnap when requested version is missing

Fix README to reflect changes in #176

add cgi module for cgit

Checks if the exact version of Tarsnap is already installed and, if so,
skips the download and build steps.

Change instructions for creating the tarsnap key to generate it at "decrypted_tarsnap.key".

Make sure that only ZNC can read its certificate

To bring this certificate in line with how those in ssl.yml are managed.

Update OpenVPN role to generate self-contained "unified" .ovpn profiles

  profiles

  * The role now generates .ovpn profiles with embedded CA, certificate,
    key, and HMAC firewall key information. These .ovpn profiles are
    compatible with OpenVPN for iOS and Android, and only a single file
    needs to be transferred to your mobile device.

  * Added explicit route information to the .ovpn profile

Add git hosting

Use libpam0g-dev instead of libpam-dev

OpenVPN 2FA support

Update README.textile

fix broken link to getting ansible

Skip the google authenticator generation if we're running as vagrant

Add a 2FA plugin for Roundcube (fixes #201)

Fix Google Authenticator file generation

Added Google Authenticator 2FA logins

Modify sshd_config in place

reduce z-push logrotation to 5 versions

Set a ServerName for apache (fixes #187)

add z-push logrotation