su: do not change to home dir unless -l

Signed-off-by: Pascal Bellard <pascal.bellard@ads-lu.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/httpd.c b/networking/httpd.c
index 12218a0..a942794 100644
--- a/networking/httpd.c
+++ b/networking/httpd.c
@@ -1414,7 +1414,7 @@
 		if (script != url) { /* paranoia */
 			*script = '\0';
 			if (chdir(url + 1) != 0) {
-				bb_perror_msg("chdir(%s)", url + 1);
+				bb_perror_msg("can't change directory to '%s'", url + 1);
 				goto error_execing_cgi;
 			}
 			// not needed: *script = '/';