SeLinux update, pcap improvment

• updated SeLinux policy file
• added SeLinux policy compile script
• list available pcap devices
• fixed build errors related to pcap

Minor changes

• change RNG device with ./configure --with-rngdev=path, defaults to /dev/random
• fixes issues on systems with low entropy available (see: #11)
• fixes openwrt/packages#8517

Extended options and Bugfixes

• improved empty ping mode (by Masaq-)
• fixed NULL pointer derefs and division by zero
• more secure chroot
• CWE-126 workaround reported by codacy
• switched to /dev/random as RNG except for Windows
• fixed CLang related build errors
• fixed SEGFAULT when network not reachable (by Masaq-)
• added extended options for protocol tuning (by Masaq-)
• Systemd support (also in debian/rules)
• fixed compilation issues for Android targets
• fixed 100% CPU consumption when receive window is full but data via select() available (by Masq-)

Major Security Enhancement

• improved error logging
• introduced icmp_filter via setsockopt to filter unwanted icmp messages
• more "secure" random number generator
• fixed NULL deref and invalid memory access by elnerd
  (https://github.com/elnerd) PoC: https://www.securityfocus.com/bid/54627/info

Android build support

• added Android build support (requires a root'ed device!)
• fixed ArchLinux PKGBUILD/AUR

Minor Improvments

• travis-ci, coverity integration
• xcompile issue for mingw-w64 fixed
• fixed wrong usage of format() specifiers

Coverity Issues Fixes

• Readme improvements
• Fixes a possible memory leak when a packet could not send
• Better error handling on socket descriptor creation
• All Coverity issues fixed

First PingTunnel-NG Release

• First public release
• Fixes a exploitable memory leak (proxy/forwarder) if using password
  protected challenge response authentication.
• Fixes an invalid memory write during a pcap capture.
• Full source refactoring. The code should be more readable imho.
• This project is now Autotools based.
  Disable optional features: SeLinux, pcap.
• Removed an already disabled and highly buggy feature: kPT_add_iphdr
• Added a more "GNU" alike option parsing.
• Support a user defined PingTunnel-NG magic value which is required
  for bypassing Cisco IPS (and maybe other IDS/IPS/Firewalls).
  This feature was well tested against Cisco's "IronPort" which
  scans for fingerprints in an ICMP packet (PingTunnel magic value).