use the new rex-sslscan gem

remove old integerated code and replace it
with the gem. done.

MS-1693

Author: David Maloney

Gemfile.lock

@@ -40,6 +40,7 @@ PATH
       rex-random_identifier
       rex-registry
       rex-socket
+      rex-sslscan
       rex-struct2
       rex-text
       rex-zip
@@ -241,6 +242,9 @@ GEM
     rex-registry (0.1.0)
     rex-socket (0.1.0)
       rex-core
+    rex-sslscan (0.1.0)
+      rex-socket
+      rex-text
     rex-struct2 (0.1.0)
     rex-text (0.2.1)
     rex-zip (0.1.0)