The log messages are very inconsistent across the code base. Add a
guideline for log messages to help improve consistency. The guideline is
based on the most commonly used style in the current code base.
Change-Id: I076d68abe588dd04b59580379e97b82d537def23
Signed-off-by: Marc Schink <dev@zapb.de>
Reviewed-on: https://review.openocd.org/c/openocd/+/8576
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>