Slowhttptest Versions Save

• Added SNI support
• Minor fixed and improvements

Adds cookie support

• Fixes the version number in the package
• Updates Dockerfile
• Fixes compilation warnings

• Bug fixes
• Modernized build scripts
• Dockerfile to build and run in a container

• fix incorrect parsing of arguments on some platforms
• allow to configure Content-Type and Accept header values
• prepare to work with openSSL 1.1.0
• fix c++11 warnings

This is a snapshot of what was released last on google code.