Merge branch 'each-style-tweak' into 'master'

adjust clang-format options to get closer to ISC style

See merge request isc-projects/bind9!3061

(cherry picked from commit d3b49b6675)

0255a974 revise .clang-format and add a C formatting script in util
e851ed0b apply the modified style

bin/tests/optional/lfsr_test.c

@@ -21,11 +21,10 @@
 uint32_t state[1024 * 64];
 
 int
-main(int argc, char **argv)
-{
+main(int argc, char **argv) {
 	isc_lfsr_t lfsr1, lfsr2;
-	int	   i;
-	uint32_t   temp;
+	int i;
+	uint32_t temp;
 
 	UNUSED(argc);
 	UNUSED(argv);