Add .gitignore .vscode/ path. Resolve the issue #374 adding tproxy mark option to allow different network mapping.

Signed-off-by: Samuel Bernardo <samuel@lip.pt>

docs/manpage.rst

@@ -274,6 +274,10 @@ Options
     Set the file name for the sudoers.d file to be added. Default is
     "sshuttle_auto". Only works with --sudoers.
 
+.. option:: -t, --tmark
+
+    Transproxy optional traffic mark with provided MARK value.
+
 .. option:: --version
 
     Print program version.

docs/tproxy.rst

@@ -8,9 +8,11 @@ There are some things you need to consider for TPROXY to work:
   done once after booting up::
 
       ip route add local default dev lo table 100
-      ip rule add fwmark 1 lookup 100
+      ip rule add fwmark {TMARK} lookup 100
       ip -6 route add local default dev lo table 100
-      ip -6 rule add fwmark 1 lookup 100
+      ip -6 rule add fwmark {TMARK} lookup 100
+  
+  where {TMARK} is the identifier mark passed with -t or --tmark flag (default value is 1).
 
 - The ``--auto-nets`` feature does not detect IPv6 routes automatically. Add IPv6
   routes manually. e.g. by adding ``'::/0'`` to the end of the command line.