haproxy: added patch to fix pcre linking

The patch was sent upstream and ack'ed by the author but obviousely forgotten.

network/haproxy/pcre-linking-fix.patch

@@ -0,0 +1,46 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../haproxy/pcre-linking-fix.patch
+# Copyright (C) 2009 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+From: Christian Wiese <[email protected]>
+Date: Thu, 20 Nov 2008 14:47:04 +0100
+Subject: [PATCH] [BUILD] Fixed Makefile for linking pcre
+
+If both make parameters USE_PCRE and USE_STATIC_PCRE are set to 1
+while building haproxy, pcre gets linked in dynamically.
+
+Therefore we check if USE_STATIC_PCRE was explicitely enabled to
+ommit the CFLAGS and LDFLAGS normally set if USE_PCRE is enabled.
+
+diff --git a/Makefile b/Makefile
+index f9696df..e141c5f 100644
+--- a/Makefile
++++ b/Makefile
+@@ -387,12 +387,14 @@ ifneq ($(USE_PCRE),)
+ ifeq ($(PCREDIR),)
+ PCREDIR	        := $(shell pcre-config --prefix 2>/dev/null || echo /usr/local)
+ endif
++ifneq ($(USE_STATIC_PCRE),1)
+ OPTIONS_CFLAGS  += -DUSE_PCRE -I$(PCREDIR)/include
+ OPTIONS_LDFLAGS += -L$(PCREDIR)/lib -lpcreposix -lpcre
++endif
+ BUILD_OPTIONS   += $(call ignore_implicit,USE_PCRE)
+ endif
+ 
+-ifneq ($(USE_STATIC_PCRE),)
++ifeq ($(USE_STATIC_PCRE),1)
+ # PCREDIR is the directory hosting include/pcre.h and lib/libpcre.*. It is
+ # automatically detected but can be forced if required.
+ ifeq ($(PCREDIR),)