libfetch: fix no_proxy domain name comparision

Fix comparing of the hostname portion that matches exactly.
The no_proxy matching is pretty rudimentary though and probably
could go through a bit of additional rework.

Fixes #10681

libfetch/common.c

@@ -1085,7 +1085,7 @@ fetch_no_proxy_match(const char *host)
 				break;
 
 		d_len = q - p;
-		if (d_len > 0 && h_len > d_len &&
+		if (d_len > 0 && h_len >= d_len &&
 		    strncasecmp(host + h_len - d_len,
 			p, d_len) == 0) {
 			/* domain name matches */