* moved dev to version 3.1.1
* laid ground for n2n-route tool
* adapted code style
* overhauled n2n-route's tool program logic and removed route code from edge
* added missing initialization of federation's purgeable field
* lifted un/purgeable confusion
* added warning about removed -n cli option
* realized that Windows does not offer inet_aton()
* removed -n option documentation from edge's man page
* slightly simplified n2n-route program logic
* applied more logic changes to n2n-route tool
* added 'info' read command to edge's management port
* corrected indention
* added Linux route control to n2n-route tool
* temporarily restricted n2n-route tool to Linux only
* We must be over the routing!
* pulled default gateway change detection into main loop to cover mobile use, and added devstr_t type
* corrected use of new UNPURGEABLE - so far gone unnoticed
* addresses possiible address issue
* i broke it
* reverted bad ideas
* added command line options, help text, and prevented vpn gateway being used for supernode/peer traffic routes
* added option to manually provide default gateway, also verbosity options
* getting there
* added option to limit networks to be routed (-n), adapted documentation
* fine-tuned minor things
