Provides for an easier use of ssh-agent.
To enable SSH-Agent forwarding, add the following line to zpreztorc:
zstyle ':prezto:module:ssh-agent' forwarding 'yes'
To load multiple identities, add the following line to zpreztorc:
zstyle ':prezto:module:ssh-agent' identities 'id_rsa' 'id_rsa2' 'id_github'
The authors of this module should be contacted via the issue tracker.