This changes a lot of things all across the EFL. Previously,
methods tagged @const had both their external prototype and
internal impl generated with const on object, while property
getters only had const on the external API. This is now changed
and it all has const everywhere.
Ref T6859.
Since connman is specific to linux, on other platforms just compile a
dummy "none" backend that will always report online and no other
details. This will be used in Windows, MacOS and other platforms that
still lack a proper backend.
The compile-time infrastructure also allows for networkmanager to be
added with ease, simply copy "efl_net*-none.c" or "efl_net*-connman.c"
to be a starting point and then add its specifics, adapting
configure.ac and Makefile_Ecore_Con.am
Daniel Kolesa
Mike Blumenkrantz
Gustavo Sverzut Barbieri