Debian: update dependencies to build on Jessie.

Unfortunately, the lua module doesn't build anymore because it depends
on libmemcache, which is not present in Jessie. The other
memcached-related modules depend on libmemcached, which is fine.

See #580

packaging/debian/control

@@ -181,7 +181,7 @@ Description: SIMPLE presence modules for OpenSIPS
 
 Package: opensips-xmlrpc-module
 Architecture: any
-Depends: opensips (= ${binary:Version}), ${misc:Depends}, ${shlibs:Depends}
+Depends: opensips (= ${binary:Version}), opensips-http-modules (= ${binary:Version})
 Description: XMLRPC support for OpenSIPS's Management Interface
  OpenSIPS is a very fast and flexible SIP (RFC3261)
  server. Written entirely in C, OpenSIPS can handle thousands calls

packaging/debian/rules

@@ -26,6 +26,9 @@ URL := https://github.com/OpenSIPS/opensips/archive/$(UPVERSION).tar.gz
 
 # List of all debian module packages we will build
 # Used to index the make variable below, which has details about each package
+#
+# LUA has been removed due to libmemcache dependency.
+#     See https://github.com/OpenSIPS/opensips/issues/580
 ALL_MODPKG_LIST := \
 	MYSQL POSTGRES UNIXODBC JABBER CPL RADIUS \
 	PRESENCE XMLRPC PERL SNMPSTATS XMPP CROUTE BERKELEY LDAP \
@@ -183,6 +186,9 @@ LDFLAGS += $(shell dpkg-buildflags --get LDFLAGS)
 # force lib (versus lib64) and SMP support all the time
 VARS = LIBDIR=lib ISSMP=yes
 
+# Debian Jessie doesn't package radius-ng, so use freeradius instead
+VARS += FREERADIUS=yes
+
 ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
 	INSTALL_PROGRAM += -s
 endif