net-mgmt/mbrowse: reduce overlinking and remove pkg dep

First no ports should ever be depending on pkg directly because it
prevents building with WITH_PKG=devel, they should depend on
${PKG_ORIGIN}.
Second, netsnmp do not expose the pkg API but only consume it, so
program linking to netsnmp should not end up being directly linked to
libpkg!

Patch the configure script to stop asking net-snmp-config for extra libs
which will faultly bring in linking against -lpkg and -lelf, and remove
entirely libpkg as a dependency on the package

net-mgmt/mbrowse/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=	mbrowse
 PORTVERSION=	0.4.3
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	net-mgmt
 MASTER_SITES=	SF/${PORTNAME}/${PORTVERSION}
 
@@ -13,8 +13,7 @@ LICENSE=	GPLv2
 
 LIB_DEPENDS=	libnetsnmp.so:net-mgmt/net-snmp \
 		libfontconfig.so:x11-fonts/fontconfig \
-		libfreetype.so:print/freetype2 \
-		libpkg.so:ports-mgmt/pkg
+		libfreetype.so:print/freetype2
 
 USES=		gnome pkgconfig ssl
 USE_GNOME=	cairo gdkpixbuf2 gtk20
@@ -22,9 +21,6 @@ GNU_CONFIGURE=	yes
 
 CONFIGURE_ARGS=	--with-snmp-prefix=${PREFIX} --with-snmp-type=net
 
-CPPFLAGS+=	`net-snmp-config --cflags`
-LDFLAGS+=	`net-snmp-config --libs`
-
 PLIST_FILES=	bin/mbrowse
 
 .include <bsd.port.mk>

net-mgmt/mbrowse/files/patch-configure

@@ -0,0 +1,12 @@
+--- configure.orig	2011-01-28 12:10:11 UTC
++++ configure
+@@ -5354,8 +5354,7 @@ $as_echo_n "checking for snmp-type... " >&6; }
+       if test "x$snmp_prefix" != "x" ; then
+         if test -x "$snmp_prefix/bin/net-snmp-config" ; then
+           SNMP_NET_LIBS=`$snmp_prefix/bin/net-snmp-config --netsnmp-libs`
+-          SNMP_EXT_LIBS=`$snmp_prefix/bin/net-snmp-config --external-libs`
+-          SNMP_LIBS="$SNMP_NET_LIBS $SNMP_EXT_LIBS"
++          SNMP_LIBS="$SNMP_NET_LIBS"
+ 	  SNMP_CFLAGS="$SNMP_CFLAGS -DHAVE_NETSNMP"
+         else
+           guess_type="ucd"