You can build lws without support for ws, with -DLWS_ROLE_WS=0.
This is thanks to the role ops isolating all the ws-specific business
in the ws role.
Also retire more test apps replaced by minmal-examples.
This replaces the old test-app for echo with separate client and server
minimal versions.
The autobahn test script is made more autonomous and tests both
client and server.
Private header stuff specific to roles should go in the
role dir and only be included if the role is enabled for
build.
Only definitions related to lws core should go in the actual
private-libwebsockets.h
