revive removed API's

In order to do proper deprecation of those API's we re-introduce them
so they can be removed in the next release. This will then also lead to
an ABI bump.

Signed-off-by: Steffen Jaeckel <jaeckel-floss@eyet-services.de>

Makefile.am

@@ -40,6 +40,7 @@ libstrophe_la_SOURCES = \
 	src/conn.c \
 	src/crypto.c \
 	src/ctx.c \
+	src/deprecated.c \
 	src/event.c \
 	src/handler.c \
 	src/hash.c \