part of fixing meek lite in Whonix

add /usr/lib/anon-gw-anonymizer-config/edit-etc-resolv-conf

https://forums.whonix.org/t/censorship-circumvention-tor-pluggable-transports/2601/9

https://forums.whonix.org/t/whonix-gateway-cli-15-0-1-5-4-meek-azure-bridge-tls-error/11383

Thanks to @Bl3ckJ4ck for the bug report!

usr/lib/python3/dist-packages/anon_connection_wizard/edit_etc_resolv_conf.py

+#!/usr/bin/python3 -u
+
+## Copyright (C) 2021 - 2021 ENCRYPTED SUPPORT LP <adrelanos@whonix.org>
+## See the file COPYING for copying conditions.
+
+import os, sys
+from subprocess import check_output, STDOUT, call, Popen, PIPE
+
+if os.path.exists('/usr/share/anon-gw-base-files/gateway'):
+    whonix=True
+else:
+    whonix=False
+
+def edit_etc_resolv_conf():
+   if not whonix:
+      ## Not implemented for non-Whonix.
+      return
+
+   try:
+      command = ['/usr/lib/anon-gw-anonymizer-config/edit-etc-resolv-conf']
+      p = Popen(command, stdout=PIPE, stderr=PIPE)
+      stdout, stderr = p.communicate()
+   except:
+      error_msg = "edit-etc-resolv-conf unexpected error: " + str(sys.exc_info()[0])
+      print(error_msg)
+
+def main():
+   edit_etc_resolv_conf()
+
+if __name__ == "__main__":
+    main()