Gwenhywfar

Partially reverted a previous commit.

Actually, we do need GWEN_InetAddr_ModuleInit() et al.

More work on compiler warnings.

More fixes for compiler warnings.

Fixed compiler warnings.

Added entry to TODO.

BUILD: Disable some warnings, started fixing compiler warnings.

Prepared release 4.99.23rc7

ConfigMgrDir: Increased verbosity in GWEN_ConfigMgrDir_MkUniqueIdFromId()

ConfigMgr: Add GWENHYWFAR_CB to virtual functions.

More printf format specifier standarization from <inttypes.h>

Minor windows debug output improvement (maybe a problem with the format specifier?)

Fix another windows printf format specifier.

In this particular case, a printf format specifier for size_t is needed,
but <inttypes.h> does not have one. We define our own, inspired from here:
https://stackoverflow.com/questions/44382862/how-to-printf-a-size-t-without-warning-in-mingw-w64-gcc-7-1

Fix printf format specifiers for windows compatibility using macros from <inttypes.h>

For explanation, see e.g.
https://en.cppreference.com/w/cpp/header/cinttypes
https://stackoverflow.com/questions/16859500/mmh-who-are-you-priu64

Fixed a bug introduced by my latest commit.

GTK3 GUI: Fixed memory leaks.

Minor windows warnings fixed

- missing include for _mkdir
- Removed cast from void* (8 byte on x86_64) to int in debug output
- Commented out unused variable (set but not used)

Minor windows compile warnings improved

- unused static function, unused variable ifdef'd out

Minor autoconf fix for gcc version output "7.3-win32"

For the console user interface, add a log level for progress messages, controlled by a new environment variable GWEN_CPROGRESS_LOGLEVEL.

For the console user interface, all output goes to stderr, mixing debug and progress messages. This patch changes progress messages and dialogs to go to stdout instead, allowing for separating debug and ui messages using shell redirections.

fix a warning (at least for GCC 7)

DB: Increased verbosity.

msgengine: Started cleanup of GWEN_MsgEngine__ReadGroup().

Removed one point from TODO list (already done).

Revert "Incorporated a patch provided by pkzw via #130."

This reverts commit 2df3e11e4cb366ee8559c2e8e05c6aad6c72cf5c.