fix cgi checking

make sure to look for files *after* the cgidir bit. should now work with
virtualhost and cgi, as it doesn't just blindly find the first slash.

main.c

@@ -38,6 +38,7 @@ void 		echdir   (const char *);
 void 		status   (const int, const char *);
 void 		status_redirect(const int, const char *);
 void 		status_error(const int, const char *);
+void		strip_trailing_slash(char *path);
 int 		uridecode (char *);
 
 
@@ -304,6 +305,14 @@ cgi(const char *cgicmd)
 	exit(1);
 }
 
+void
+strip_trailing_slash(char *path)
+{
+	size_t len = strlen(path);
+	while (path[len - 1] == '/')
+		path[len-- - 1] = '\0';
+}
+
 int
 main(int argc, char **argv)
 {
@@ -461,13 +470,15 @@ main(int argc, char **argv)
 		/* find the string of cgidir without chroot_dir prefix */
 		char	tmp [PATH_MAX] = {'\0'};
 		char	*cgipp;
+		strip_trailing_slash(chroot_dir);
+		strip_trailing_slash(cgidir);
 		estrlcpy(tmp, cgidir + strlen(chroot_dir), sizeof(tmp));
 		cgipp = tmp;
 		if (tmp[0] == '/')
 			cgipp++;
 
 		if (docgi && strncmp(dir, cgipp, strlen(cgipp)) == 0) {
-			pos = strchr(dir, '/');
+			pos = strchr(dir+strlen(cgipp), '/');
 		} else {
 			pos = strrchr(dir, '/');
 		}