* add internal routes for ssh hook comands
* fix lint
* add comment on why package named private not internal but the route name is internal
* add comment above package private why package named private not internal but the route name is internal
* remove exp time on internal access
* move routes from /internal to /api/internal
* add comment and defer on UpdatePublicKeyUpdated
* move all push update to git hook post-receive and protected branch check to git hook pre-receive
* add SSH_ORIGINAL_COMMAND check back
* remove all unused codes
* fix the import
Lunny Xiao
Bo-Yi Wu
Fabian Zaremba
Ethan Koenig