allow to use in single threaded mode

(some client side channels and all server side channels still need to be
ported to new api)

server: build fix, do not disable threads for rfx encoder

cliprdr client channel: implemented support for DisableThreads option
looks like thread does not make sense at all for this channel

do not initialize disabled image codecs (respect settings)

channels: client: rail: added support for DisableThreads setting

changed "BOOL DisableThreads" to "UINT32 ThreadingFlags"
dropped unnecessary apu changes

draft implementation of threading settings aware message handling api
for addins/channels

rail: use new messaging api

fixed memory leak

msgs handlers external api changes (as requested)

msgs_handlers: init fix

fixed memory leak

logic fix

resolved problems appeared after rebase to master, dropped unnecessary
changes

git clang-format origin/master

fixed TestFreeRDPCodecRemoteFX.c

"formatting, run `clang-format` please"

properly use new "rfx_context_new(BOOL, UINT32)" everywhere

passed Threading Flags to "rfx_context_new" where available

in older C standarts veriables declaration must be done before any code

requested changes

clang-format as requested

use broken signatures of standert C functions for m$ s**tos

clang-format

requested changes

requested changes

moved ThreadingFlags to stable api zone

define type for channel msg handler

typo fix

clang-format

build fix

us ThreadingFlags from server settings

git clang-format origin/master

clang-format

uwac/include/uwac/uwac.h

@@ -276,7 +276,8 @@ struct uwac_output_geometry_event
 typedef struct uwac_output_geometry_event UwacOutputGeometryEvent;
 
 /** @brief */
-union uwac_event {
+union uwac_event
+{
 	int type;
 	UwacOutputNewEvent output_new;
 	UwacOutputGeometryEvent output_geometry;