Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Hopefully all functions with printf like arguments now use format checking.

This was tested with default build configuration on linux
and windows hosts (including some cross compilations),
so chances are good that there remain few (if any) functions
without format checking.

Therefore the last comment in HACKING is no longer valid but misleading.

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Add rules for printf-like functions, based on libvirt HACKING.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Add string management rules, somewhat like libvirt HACKING.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Add memory management rules, somewhat like libvirt HACKING.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Add C type rules, adapted from libvirt HACKING. Also include
a description of special QEMU scalar types.

Move typedef rule from CODING_STYLE rule 3 to HACKING rule 6
where it belongs.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Add a new file, HACKING, in order to collect recurring
issues with submitted patches.

Start with preprocessor rules, adapted from libvirt HACKING.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>