reduce fingerprinting of site owner

replace version with generic `user_agent` that will remain constant

src/Config.py

@@ -14,8 +14,9 @@ class Config(object):
 
     def __init__(self, argv):
         self.version = "0.7.6+"
+        self.user_agent = "conservancy"
         # DEPRECATED ; replace with git-generated commit
-        self.rev = 5031
+        self.rev = 5032
         self.argv = argv
         self.action = None
         self.test_parser = None

src/Connection/Connection.py

@@ -362,7 +362,7 @@ class Connection(object):
                 self.server.log.warning("Unknown target onion address: %s" % self.target_onion)
 
         handshake = {
-            "version": "conservancy",
+            "version": config.user_agent,
             "protocol": "v2",
             "use_bin_type": True,
             "peer_id": peer_id,

src/Content/ContentManager.py

@@ -729,7 +729,8 @@ class ContentManager(object):
 
         new_content["modified"] = int(time.time())  # Add timestamp
         if inner_path == "content.json":
-            new_content["zeronet_version"] = config.version
+            # add for backward compatibility, but don't expose user version
+            new_content["zeronet_version"] = config.user_agent
             new_content["signs_required"] = content.get("signs_required", 1)
 
         new_content["address"] = self.site.address