ObjFW  Diff

	old = [_headers objectForKey: key];
	if (old != nil)
		value = [old stringByAppendingFormat: @",%@", value];

	[_headers setObject: value forKey: key];

	if ([key isEqual: @"Host"]) {
		pos = [value
		pos = [value rangeOfString: @":"
		    rangeOfString: @":"
			  options: OF_STRING_SEARCH_BACKWARDS].location;
				   options: OFStringSearchBackwards].location;

		if (pos != OFNotFound) {
			[_host release];
			_host = [[value substringToIndex: pos] retain];

			@try {
				unsigned long long portTmp =