When config.h is not included, the build
configuration is missing from the translation
unit in question. This affects ENABLE_SSL,
for one.
Also, HttpRequest.hpp depends on LOOLWSD_VERSION,
which is defined in config.h.
The config.h header must be included in all
trasnlation-units, and must be the first include.
This is to avoid conflicts and/or mismatching
binaries built with different compile-time values.
We also statically assert if LOOLWSD_VERSION
is not defined, to help the error message.
Change-Id: Ic4b45de879f3360a07e9507fdf04abfa4cec6a71
Signed-off-by: Ashod Nakashian <ashod.nakashian@collabora.co.uk>