remove OpenBSD #warning (obsd maintainer says no longer needed)

CHANGES

@@ -1,4 +1,5 @@
 0.32:
+  remove OpenBSD #warning (obsd maintainer says no longer needed)
 
 0.31:
   special case buffer_get_token with token length 1 through memccpy (almost 4x speedup)

io/io_passfd.c

@@ -11,15 +11,8 @@ int io_passfd(int64 sock,int64 fd) {
 #define _NETBSD_SOURCE
 #endif
 
-#ifdef __OpenBSD__
-#warning This is a HORRIBLE kludge around yet another thing OpenBSD broke
-#warning If they make it possible to do file descriptor passing with
-#warning _XOPEN_SOURCE defined, please send me an email so I can remove this.
-#warning _XOPEN_SOURCE needs to be defined for this to work on Solaris.
-#else
 #define _XOPEN_SOURCE
 #define _XOPEN_SOURCE_EXTENDED 1
-#endif
 #include <stddef.h>
 #include <sys/types.h>
 #include <sys/time.h>

io/io_readfile.3

@@ -12,4 +12,4 @@ disk file named \fIs\fR, and returns 1.
 If something goes wrong, io_readfile sets \fIerrno\fR to indicate the error, and
 returns 0; it does not create a new descriptor, and it does not touch d.
 .SH "SEE ALSO"
-io_createfilefile(3), io_appendfile(3), io_readwritefile(3)
+io_createfile(3), io_appendfile(3), io_readwritefile(3)

io/io_receivefd.c

@@ -11,15 +11,8 @@ int64 io_receivefd(int64 sock) {
 #define _NETBSD_SOURCE
 #endif
 
-#ifdef __OpenBSD__
-#warning This is a HORRIBLE kludge around yet another thing OpenBSD broke
-#warning If they make it possible to do file descriptor passing with
-#warning _XOPEN_SOURCE defined, please send me an email so I can remove this.
-#warning _XOPEN_SOURCE needs to be defined for this to work on Solaris.
-#else
 #define _XOPEN_SOURCE
 #define _XOPEN_SOURCE_EXTENDED 1
-#endif
 #include <stddef.h>
 #include <sys/types.h>
 #include <sys/socket.h>