Add block to mount network share

[dsbert]

This block mounts a network share. It also runs the command service rpcbind start because rpcbind is not enabled by default on raspbian.

[davidferguson]

Would you be able to give an example of how to use this block, as I can't seem to get it to work myself.

• When I use the server cifs://server-hostname/share I get the error mount.nfs: Failed to resolve server cifs
• When I use the server nfs://server-hostname/share I get the error mount.nfs: NFS URLs are not supported

[dsbert]

I uses this to successfully connect to an nfs share with hostname:/path. I didn't try it with the protocol as part of the string.