Fix missing GEOIP2_MMDB environment variable if the DB is in /etc/re6stnet

In commit d7a4d73f,
this was done only for the init.d script.

daemon/network-manager

@@ -21,6 +21,9 @@ if action in ("up", "vpn-up"):
                 raise
             sys.stderr.write("daemon already started\n")
             sys.exit()
+        mmdb = "GeoLite2-Country.mmdb"
+        if os.path.isfile(mmdb):
+            os.environ["GEOIP2_MMDB"] = os.path.join(CONFDIR, mmdb)
         if not os.fork():
             os.setsid()
             os.execlp(DAEMON, DAEMON, "@re6stnet.conf")

daemon/re6stnet.service

@@ -5,7 +5,7 @@ ConditionPathExists=/etc/re6stnet/re6stnet.conf
 [Service]
 WorkingDirectory=/etc/re6stnet
 # systemd plans to "introduce ExecCondition= in services" (cf its TODO file)
-ExecStart=/bin/sh -c 'set re6stnet @re6stnet.conf; "$@" --test main_interface==\"lo\" || exec "$@"'
+ExecStart=/bin/sh -c 'set re6stnet @re6stnet.conf; GEOIP2_MMDB=/etc/re6stnet/GeoLite2-Country.mmdb; [ -r $GEOIP2_MMDB ] && export GEOIP2_MMDB; "$@" --test main_interface==\"lo\" || exec "$@"'
 Restart=on-failure
 StandardOutput=null