Now that we don't use syslog, "level" does sound more commonplace. We
should change it while there is still nobody using it.
Also leave some space between the integers of the xkb_log_level enum
values, if we ever need to shove more in between.
Signed-off-by: Ran Benita <ran234@gmail.com>
It's more tidy and less error prone, since we use strcasecmp == 0 a lot.
We replace strcmp == 0 by streq, strcasecmp == 0 by istreq,
uStrCasePrefix by istreq_prefix and uDupString by strdup_safe.
Signed-off-by: Ran Benita <ran234@gmail.com>