Fix vector static initializer
Add command line configuration override
Add thread API functions

Add functions to get the current and the main thread.
Move fatal error signal handling to the lib haka

The fatal error signals are now handled by the lib. It is also possible
to register cleanup functions for them.
Add iptables cleanup on fatal signals
Update haka command line doc
Update man page

The haka and hakapcap options have been changed.
Add log level per module in config, options, hakactl, lua
Update doc for log level
Fix segv

Fix segmentation fault issue when a remote does not set up a completion
function.
Fix state machine finish transition

Finish transition should be called after the leave transition. This
avoid possible issue if the finish transition does some cleanup which
might break a leave transition.
Fix lua compilation

It was not possible to have two lua_compile macro in the smae
CMakeFiles.txt.
Remove unneeded empty line in history

The interactive mode was keeping in history the empty lines.
Fix doc typo
Set doc navbar floating
Remove list ticks in toctree as title are already numbered
Fix Sphinx search links

In Sphinx, when searching for a keyword, the display name and link used
to be incorrect.
Add FAQ questions & answers
Change doc main page titles
Improve ref guide introduction