Variable: server-mode-hook
server-mode-hook is a customizable variable defined in server.el.gz.
Value
nil
Documentation
Hook run after entering or leaving server-mode(var)/server-mode(fun).
No problems result if this variable is not bound.
add-hook automatically binds it. (This is true for all hook variables.)
Source Code
;; Defined in /usr/src/emacs/lisp/server.el.gz