Throughout Cygwin, use u_intN_t or uintN_t

Don't use u_char, u_short, u_int or u_long in Cygwin, unless it refers
to the Winsock types.  Use u_intN_t in BSD-based sources, unsigned char
where strings are concerned, uintN_t otherwise.  Also:

	* net.cc: Fix comment, we're not using u_long anymore.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/mcount.c

@@ -63,7 +63,7 @@ _MCOUNT_DECL (size_t, size_t);
 
 _MCOUNT_DECL (size_t frompc, size_t selfpc)
 {
-	register u_short *frompcindex;
+	register u_int16_t *frompcindex;
 	register struct tostruct *top, *prevtop;
 	register struct gmonparam *p;
 	register long toindex;