Merge branch 'rs/use-isxdigit' into maint

Code cleanup.

* rs/use-isxdigit:
  use isxdigit() for checking if a character is a hexadecimal digit

sha1_name.c

diff --git a/sha1_name.c b/sha1_name.c
index 95f9f8f..6d10f05 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -757,7 +757,7 @@
 
 	for (cp = name + len - 1; name + 2 <= cp; cp--) {
 		char ch = *cp;
-		if (hexval(ch) & ~0377) {
+		if (!isxdigit(ch)) {
 			/* We must be looking at g in "SOMETHING-g"
 			 * for it to be describe output.
 			 */

transport.c

diff --git a/transport.c b/transport.c
index 08bcd3a..862f63f 100644
--- a/transport.c
+++ b/transport.c
@@ -117,7 +117,7 @@
 			return;
 		}
 
-		if (hexval(buffer[0]) > 0xf)
+		if (!isxdigit(buffer[0]))
 			continue;
 		len = strlen(buffer);
 		if (len && buffer[len - 1] == '\n')