Include <stdarg.h> if HAVE_STDARG_H.

src/server/admin.c

src/server/conference.c

src/server/dbck-cache.c

src/server/internal-connections.c

src/server/membership.c

src/server/memory.c

src/server/person.c

src/server/prot-a-parse.c

src/server/ram-output.c

src/server/ram-parse.c

src/server/regex-match.c

src/server/send-async.c

src/server/session.c

src/server/simple-cache.c

src/server/text-garb.c

src/server/text.c