Add documentation for the new domain plugin hooks
Add documentation for the new domain plugin hooks

Signed-off-by: Jeroen van Baarsen <2e488d5cebaf6d2832884be70e328933bd4c80ab@gmail.com>

jimjag/dokku,econya/dokku,expa/dokku,elia/dokku,fruitl00p/dokku,dokku/dokku,codeconfab/dokku,progrium/dokku,crisward/dokku,claytonbrown/dokku,alessio/dokku,sseemayer/dokku,claytonbrown/dokku,alexquick/dokku,sseemayer/dokku,jimjag/dokku,Evlos/dokku,alexquick/dokku,elia/dokku,alexquick/dokku,econya/dokku,econya/dokku,alessio/dokku,claytonbrown/dokku,johnfraney/dokku,fruitl00p/dokku,progrium/dokku,claytonbrown/dokku,dokku/dokku,elia/dokku,crisward/dokku,amaltson/dokku,jimjag/dokku,econya/dokku,dokku/dokku,progrium/dokku,econya/dokku,expa/dokku,crisward/dokku,codeconfab/dokku,dokku/dokku,Evlos/dokku,fruitl00p/dokku,progrium/dokku,expa/dokku,codeconfab/dokku,jimjag/dokku,progrium/dokku,crisward/dokku,alexquick/dokku,alessio/dokku,sseemayer/dokku,elia/dokku,codeconfab/dokku,johnfraney/dokku,Evlos/dokku,elia/dokku,fruitl00p/dokku,crisward/dokku,alessio/dokku,elia/dokku,sseemayer/dokku,codeconfab/dokku,amaltson/dokku,dokku/dokku,sseemayer/dokku,expa/dokku,johnfraney/dokku,alexquick/dokku,Evlos/dokku,jimjag/dokku,fruitl00p/dokku,johnfraney/dokku,alessio/dokku,amaltson/dokku,jimjag/dokku,progrium/dokku,dokku/dokku,johnfraney/dokku,amaltson/dokku,johnfraney/dokku,expa/dokku,alexquick/dokku,econya/dokku,claytonbrown/dokku,Evlos/dokku,expa/dokku,codeconfab/dokku,alexquick/dokku,crisward/dokku,expa/dokku,sseemayer/dokku,crisward/dokku,jimjag/dokku,elia/dokku,jimjag/dokku,codeconfab/dokku,Evlos/dokku,amaltson/dokku,Evlos/dokku,alessio/dokku,amaltson/dokku,amaltson/dokku,claytonbrown/dokku,alessio/dokku,fruitl00p/dokku,expa/dokku,codeconfab/dokku,johnfraney/dokku,claytonbrown/dokku,fruitl00p/dokku,amaltson/dokku,crisward/dokku,dokku/dokku,sseemayer/dokku,claytonbrown/dokku,progrium/dokku,progrium/dokku,elia/dokku,econya/dokku,Evlos/dokku,fruitl00p/dokku,sseemayer/dokku,dokku/dokku,alexquick/dokku,johnfraney/dokku,econya/dokku,alessio/dokku