ignore -- when starting container.

Add capability to use agent from private registry

Add bindmounting in certificate for ldap ssl/tls

[WIP] Add support to download and run local agents

To support networks that may not have access to CDN the agents
are now downloaded into the rancher/server container. They are
compressed and accessed through the CATTLE_ settings. The default
behavior will now be to use the local agents. If a user wants to
leverage the CDN versions a `-e USE_LOCAL_AGENTS=false` must be
passed when starting the container.

MySQL bind mount support

Support bind mounting a volume into /var/lib/mysql.
This will change the mysql UID to that of the bound
volume if the vboxguest kernel module is found.

Also:
  * fixes key_buffer prefix warnings during startup.
  * Added /var/log/mysql volume to dockerfile.
  * Added MySQL master configuration options.

Vagrantfile: use RancherOS