* Add new file 'network_traffic_filter.c/.h"
* Add feature to drop or accept specific packet transmit over edge network interface by rules.
* fix CMakeLists.txt typo
* Update Rule String Format
* replace -F (filter) with -R (rule) for traffic restrictions.
* Update edge help (-h) message. Update documents.
* Pass Build on CircleCI and local Windows 10 VS2019
* Fix cmake build failed because of sn_selection
* fix operate void* cause vs2016 build failed
* Fix typo to pass build on windows.
* add inttypes.h for n2n_typedefs.h to pass windows build
* modify headers to pass build on windows.
1. Automatically assign IP addresses to the edge through the DHCP function that comes with sn, the default IP address pool is 172.17.12.0/24.
2. The -d parameter is added to sn, and the IP address pool of the embedded DHCP can be customized.
3. Now edge does not need to add -a and -s parameters to automatically obtain the IP address.
4. The IP automatically obtained by the cross-community edge can be the same, because the communities are isolated from each other and do not interfere with each other.
5. On the management side of sn (127.0.0.1:5645), you can now view the IP address of the tutap adapter of each edge.
6. Fix many bugs that have a certain chance of causing memory leaks.
7. Note: This version is not fully compatible with the previous version.
1. CMakeLists.txt added to automatically obtain the revised version number from the git repository.
2. Adjusted some header files to fix Windows platform compilation errors.
3. Eliminate some compilation warnings.
