Initial checkin of resolver.php

- use \\ instead of just \ in FileName
- Use file_put_contents instead of open/write
- Use file_exist instead of stat
- Added /lib directory
- Moved /tftpboot/index.cfg -> /config.ini
- Moved /tftpboot/resolver.php -> /lib/resolver.php
- Added /lib/config.php
  - include /lib/config.php in resolver.php and index.php
- Changed $config array
- Remove print_r($config['main']['base_path']) from config.php
- Add isValidRequest() function
- Use Boolean in tree_base data
- Simplify config['subdirs'] substitution
- Add lib/utils.php file
- Added simple shell/utf/html escape checking
- Added a collection of test cases (we need some more escape checking ones)
- Added lib/logger.php (copied from tftpserver.php, so that it can be reused for that).
- Clarify config.ini logformat
- Update logger implementation
- Replaced index.php with version that uses lib/resolver.php
- Replaced ../etc/nginx/sites-available/tftpboot Example file

lib/utils.php

@@ -0,0 +1,10 @@
+<?php
+//
+// Helper functions
+//
+
+function utf8_urldecode($str) {
+	$str = preg_replace("/%u([0-9a-f]{3,4})/i","&#x\\1;",urldecode($str));
+	return html_entity_decode($str,null,'UTF-8');;
+}
+?>