[PATCH libtirpc] Disable libtirpc's own bindresvport{,_sa}() in favor of Cygwin's

[Mark Geisert]

I don't have libtirpc in git so I'm submitting a text patch.  Sorry for any 
inconvenience.  This is Cygwin-specific and against src/bindresvport.c of 
libtirpc 1.0.1.  Unsure if it ought to go upstream; appreciate input on that.
Thanks much,

..mark

--------8<--------
35a36,38
 > /* On Cygwin prefer Cygwin's bindresvport{,_sa}() to portable version here */
 > #if !defined(__CYGWIN__)
 >
247a251,252
 >
 > #endif /* !defined(__CYGWIN__) */