treewide: use log_*_errno whenever %m is in the format string

If the format string contains %m, clearly errno must have a meaningful
value, so we might as well use log_*_errno to have ERRNO= logged.

Using:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/'

Plus some whitespace, linewrap, and indent adjustments.

src/rfkill/rfkill.c

@@ -59,7 +59,7 @@ int main(int argc, char *argv[]) {
         device = udev_device_new_from_subsystem_sysname(udev, "rfkill", argv[2]);
         if (!device) {
                 if (errno != 0)
-                        log_error("Failed to get rfkill device '%s': %m", argv[2]);
+                        log_error_errno(errno, "Failed to get rfkill device '%s': %m", argv[2]);
                 else
                         log_oom();