Merge branch 'ab/config-based-hooks-1'

Mostly preliminary clean-up in the hook API.

* ab/config-based-hooks-1:
  hook-list.h: add a generated list of hooks, like config-list.h
  hook.c users: use "hook_exists()" instead of "find_hook()"
  hook.c: add a hook_exists() wrapper and use it in bugreport.c
  hook.[ch]: move find_hook() from run-command.c to hook.c
  Makefile: remove an out-of-date comment
  Makefile: don't perform "mv $@+ $@" dance for $(GENERATED_H)
  Makefile: stop hardcoding {command,config}-list.h
  Makefile: mark "check" target as .PHONY

sequencer.c

@@ -8,6 +8,7 @@
 #include "sequencer.h"
 #include "tag.h"
 #include "run-command.h"
+#include "hook.h"
 #include "exec-cmd.h"
 #include "utf8.h"
 #include "cache-tree.h"
@@ -1459,7 +1460,7 @@ static int try_to_commit(struct repository *r,
 		}
 	}
 
-	if (find_hook("prepare-commit-msg")) {
+	if (hook_exists("prepare-commit-msg")) {
 		res = run_prepare_commit_msg_hook(r, msg, hook_commit);
 		if (res)
 			goto out;