* cygwin.din (utmpxname): Export.

* syscalls.cc (utmpxname): Create export alias to utmpname.
	* include/utmpx.h: Define ut_name and ut_xtime if not already defined.
	(utmpxname): Add prototype.
	* include/sys/utmp.h: Only define ut_name if not already defined.
	* include/cygwin/version.h: Bump API minor version.

winsup/cygwin/syscalls.cc

@@ -2597,6 +2597,7 @@ utmpname (const char *file)
   utmp_file = strdup (file);
   debug_printf ("New UTMP file: %s", utmp_file);
 }
+EXPORT_ALIAS (utmpname, utmpxname)
 
 /* Note: do not make NO_COPY */
 static struct utmp utmp_data_buf[16];