Add missing documentation on callbacks fired.
Add missing documentation on callbacks fired.

sheldon/epgp,protomech/epgp-dkp-reloaded,hayword/tfatf_epgp,hayword/tfatf_epgp,protomech/epgp-dkp-reloaded,sheldon/epgp,ceason/epgp-tfatf,ceason/epgp-tfatf