1. Use <stdbool.h> if it is available but keep a compatibility shim in
shared/defines.h in case it is not.
2. Unbreak the circular header dependencies (mostly):
2a. client.c and client.h may NOT depend on 'struct Menu'. Use a void pointer
and casts instead.
2b. Separate the data type definitions in client.h and screen.h from
function prototypes which may require other data structures. This makes
header dependencies much more easy to maintain. Usually the data types
should have been moved to their own files but I (mmdolze) chose to
separate them using different header guards.
2c. Remove many now unused header includes.
Apply (old BSD-) style on menuscreens.c.
- explicitely declare void arguments
- make a few string args const
* better support for shorter displays in server screen
* make target to create top level tag file
'custom_main_menu' instead of 'main_menu' is used for
navigation. The "real" main menu is saved in a variable
- Adaptation to the MenuItem changes (V.Boerchers)
- Now using priority classes internally and in protocol
- Converting (depreciated) priorty numbers to the classes BACKGROUND,
INFO and FOREGROUND
- Added menu_goto command (only works when menu not active)
- Moved and altered code to create, destroy and manipulate clients, screens
and widgets in an OO-like manner.
- Moved command execution code to a commands directory, splitting commands to
what subject they are concerned.
- Menus are temporary disabled while working on new menu structure.
mmdolze