- update requirements, remove GD check

INSTALL

@@ -12,10 +12,9 @@ REQUIREMENTS
 * The Apache or Lighttpd Webserver
 * .htaccess support allowing overrides for DirectoryIndex
 * PHP Version 5.2 or greater including
-   - PCRE (perl compatible regular expression)
-   - DOM (xml document object model)
+   - PCRE, DOM, JSON, XML, Session, Sockets (required)
    - libiconv (recommended)
-   - mbstring (optional)
+   - mbstring, fileinfo, mcrypt (optional)
 * php.ini options:
    - error_reporting E_ALL & ~E_NOTICE (or lower)
    - memory_limit (increase as suitable to support large attachments)
@@ -23,7 +22,7 @@ REQUIREMENTS
    - session.auto_start disabled
    - zend.ze1_compatibility_mode disabled
 * PHP compiled with OpenSSL to connect to IMAPS and to use the spell checker
-* A MySQL or PostgreSQL database engine or the SQLite extension for PHP
+* A MySQL, PostgreSQL or MSSQL database engine or the SQLite extension for PHP
 * One of the above databases with permission to create tables
 * An SMTP server or PHP configured for mail delivery
 

installer/check.php

@@ -6,7 +6,7 @@ $required_php_exts = array('PCRE' => 'pcre', 'DOM' => 'dom',
 
 $optional_php_exts = array('FileInfo' => 'fileinfo', 'Libiconv' => 'iconv',
     'Multibyte' => 'mbstring', 'OpenSSL' => 'openssl', 'Mcrypt' => 'mcrypt',
-    'GD' => 'gd');
+);
 
 $required_libs = array('PEAR' => 'PEAR.php', 'MDB2' => 'MDB2.php',
     'Net_SMTP' => 'Net/SMTP.php', 'Mail_mime' => 'Mail/mime.php',
@@ -30,7 +30,6 @@ $source_urls = array(
     'Multibyte' => 'http://www.php.net/manual/en/book.mbstring.php',
     'Mcrypt' => 'http://www.php.net/manual/en/book.mcrypt.php',
     'OpenSSL' => 'http://www.php.net/manual/en/book.openssl.php',
-    'GD' => 'http://www.php.net/manual/en/book.image.php',
     'JSON' => 'http://www.php.net/manual/en/book.json.php',
     'DOM' => 'http://www.php.net/manual/en/book.dom.php',
     'PEAR' => 'http://pear.php.net',