[BUGFIX] Set correct file extensions in ['SYS']['mediafile_ext']

The file extensions mp3, wav, mp4 and webm are added to
$GLOBALS['TYPO3_CONF_VARS']['SYS']['mediafile_ext'].

The extensions mov and avi are removed as these are not supported
by the renderer classes provided by the core.

Change-Id: I445054687fc4f56640e2455cb83f8ae30b9bbde4
Resolves: #70298
Releases: master
Reviewed-on: http://review.typo3.org/43732


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/core/Configuration/DefaultConfiguration.php

@@ -86,7 +86,7 @@ return array(
 		 */
 		'curlTimeout' => 0,						// Integer: Timeout value for cURL requests in seconds. 0 means to wait indefinitely. Deprecated since 4.6 - will be removed in 6.2. See below for http options.
 		'textfile_ext' => 'txt,ts,typoscript,html,htm,css,tmpl,js,sql,xml,csv,xlf',	// Text file extensions. Those that can be edited. Executable PHP files may not be editable in webspace if disallowed!
-		'mediafile_ext' => 'gif,jpg,jpeg,bmp,png,pdf,svg,ai,mov,avi,youtube,vimeo',	// Commalist of file extensions perceived as media files by TYPO3. Lowercase and no spaces between!
+		'mediafile_ext' => 'gif,jpg,jpeg,bmp,png,pdf,svg,ai,mp3,wav,mp4,webm,youtube,vimeo',	// Commalist of file extensions perceived as media files by TYPO3. Lowercase and no spaces between!
 		'binPath' => '',						// String: List of absolute paths where external programs should be searched for. Eg. <code>/usr/local/webbin/,/home/xyz/bin/</code>. (ImageMagick path have to be configured separately)
 		'binSetup' => '',						// String (textarea): List of programs (separated by newline or comma). By default programs will be searched in default paths and the special paths defined by 'binPath'. When PHP has openbasedir enabled the programs can not be found and have to be configured here. Example: <code>perl=/usr/bin/perl,unzip=/usr/local/bin/unzip</code>
 		't3lib_cs_convMethod' => '',			// String (values: "iconv", "recode", "mbstring", default is homemade PHP-code). Defines which of these PHP-features to use for various charset conversion functions in \TYPO3\CMS\Core\Charset\CharsetConverter. Will speed up charset conversion radically.