HP-UX is icky in that EAGAIN != EWOULDBLOCK and select(2) can return both

things. Fortunately libX11 has code to handle this already. Enable it
for HP-UX.

x11/libX11/distinfo

@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.6 2007/08/05 22:39:38 joerg Exp $
+$NetBSD: distinfo,v 1.7 2008/01/14 06:50:51 tnn Exp $
 
 SHA1 (libX11-1.1.3.tar.bz2) = 235f69172b262f874d2a2d7bd17e8197aea5b767
 RMD160 (libX11-1.1.3.tar.bz2) = fcb8d5d31befa0ae227210dc7274c17b30c37fad
@@ -10,3 +10,4 @@ SHA1 (patch-ad) = 58645e734f48334ce5cbf62f5870d087d95194ee
 SHA1 (patch-ae) = 124c47038ac2c12dd37f3f63606396b9ed976822
 SHA1 (patch-af) = a97f3b31eecc783caecfeb315ac2cf6603ec32a5
 SHA1 (patch-ag) = 0d1cf4804049fd3640d627ddfbab7b717f20b445
+SHA1 (patch-ah) = 7c8e5a87c4cf3048e54448bef60e69193b39f24b

x11/libX11/patches/patch-ah

@@ -0,0 +1,15 @@
+$NetBSD: patch-ah,v 1.1 2008/01/14 06:50:52 tnn Exp $
+
+--- src/XlibInt.c.orig	2007-07-21 10:45:39.000000000 +0200
++++ src/XlibInt.c
+@@ -138,6 +138,10 @@ xthread_t (*_Xthread_self_fn)(void) = NU
+ #ifdef ISC
+ #define ECHECK(err) ((errno == err) || ETEST())
+ #else
++#ifdef __hpux
++#define ECHECK(err) ((errno == err) || ETEST())
++#define SUNSYSV 1
++#else
+ #define ECHECK(err) (errno == err)
+ #endif
+ #define ESET(val) errno = val