(svn r1077) Implements scripts/autoexec.scr to get executed on game starting (sign_de)

- %! allows to merge alias parameters
- \% allows to use % in alias strings
- "alias" command now overwrites the old alias list entry

console_cmds.c

@@ -367,8 +367,17 @@ DEF_CONSOLE_CMD(ConPrintFC)
 
 DEF_CONSOLE_CMD(ConAlias)
 {
+	_iconsole_alias* alias;
+
 	if (argc < 3) return NULL;
-	IConsoleAliasRegister(argv[1],argv[2]);
+
+	alias = IConsoleAliasGet(argv[1]);
+	if (alias == NULL) {
+		IConsoleAliasRegister(argv[1],argv[2]);
+	} else {
+		free(alias->cmdline);
+		alias->cmdline = strdup(argv[2]);
+	}
 	return NULL;
 }