MINOR: wdt: Move the definitions of WDTSIG and DEBUGSIG into types/signal.h.

Move the definition of WDTSIG and DEBUGSIG from wdt.c and debug.c into
types/signal.h, so that we can access them in another file.
We need those definition to avoid blocking those signals when running
__signal_process_queue().

This should be backported to 2.1, 2.0 and 1.9.

(cherry picked from commit de01ea9878870dad5df1471743097851f53e7793)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit a27875ffb48725d277089b03c7e2e8380e4d5678)
Signed-off-by: Willy Tarreau <w@1wt.eu>
3 files changed