contrib: move private files, part of upcoming contrib code rework

Long story short: we don't want contrib code inside src/opnsense/contrib
so a few things need to be shuffled.  First pass is moving the current
contrib stuff to the same location instead and migrating the non-code
tzdata file.

(cherry picked from commit b1120c8e)

contrib/Makefile

-ROOT=	/usr/local/share
-TREES=	openvpn mobile-broadband-provider-info
+ROOT=	/usr/local/opnsense/contrib
+TREES=	mobile-broadband-provider-info openvpn tzdata
 
 .include "../Mk/tree.mk"

src/etc/inc/openvpn-client-export.inc

@@ -459,7 +459,7 @@ function openvpn_client_export_installer($srvid, $usrid, $crtid, $useaddr, $veri
 			$client_install_exe = "openvpn-install-{$current_openvpn_version}-I0{$current_openvpn_version_rev}-i686.exe";
 	}
 
-	$ovpndir = "/usr/local/share/openvpn";
+	$ovpndir = "/usr/local/opnsense/contrib/openvpn";
 	$workdir = "{$ovpndir}/client-export";
 
 	$validconfig = openvpn_client_export_validate_config($srvid, $usrid, $crtid);
@@ -563,7 +563,7 @@ function viscosity_openvpn_client_config_exporter($srvid, $usrid, $crtid, $usead
 	global $config, $g;
 	$uname_p = trim(exec("uname -p"));
 
-	$ovpndir = "/usr/local/share/openvpn/";
+	$ovpndir = "/usr/local/opnsense/contrib/openvpn/";
 
 	$uniq = uniqid();
 	$tempdir = "/tmp/openvpn-export-{$uniq}";

src/www/getserviceproviders.php

@@ -32,7 +32,7 @@ require_once("services.inc");
 require_once("pfsense-utils.inc");
 require_once("system.inc");
 
-$serviceproviders_xml = "/usr/local/share/mobile-broadband-provider-info/serviceproviders.xml";
+$serviceproviders_xml = "/usr/local/opnsense/contrib/mobile-broadband-provider-info/serviceproviders.xml";
 $serviceproviders_contents = file_get_contents($serviceproviders_xml);
 $serviceproviders_attr = xml2array($serviceproviders_contents,1,"attr");