It seems `eclint fix folder/file` sometimes dos not work, but `eclint
fix folder/` worked.

We don't need ssl features in shellinabox as we make it listen on a unix socket.
This allows to remove the dependency between shellinabox and openssl.

envirionment+= seems not working here.

Interesting new features:
 * unix domain support
 * copy & paste with browser integration (Ctrl+C, Paste from browser in
 * popup)
 * warn before closing
 * fix bug when zooming from browser

For compatibility, the new shellinabox is named 'shellinabox-github'.
The previous component with ipv6 support is kept as 'shellinabox-2.10'
and is still the default when using 'shellinabox'