Fix make_options_def to make it work under python3.
Format source code.
Fix compiling issue on CYGWIN.
Fix issue for not SANE_SORTING

Remove obsolete header files.
Remove obselete settings from testsuite.
Merge pull request #214 from sunyc/master

Fix compiling issue on CYGWIN
fix add_vmessage
Adding a telnet edit testcase.
Merge pull request #218 from sunyc/master

fix add_vmessage
Fix possible getaddrinfo leak in rare case.
Revert "Remove support for ! char as the escap ecommand. (Please complain if you are still using this somehow)."

This reverts commit d288af83d6fa158950e4eaad25d5e7049bb752ab.
Merge pull request #220 from sunyc/master

Revert "Remove support for ! char as the escap ecommand.