[BUGFIX] Use proper key name in db config

Releases: master,8.7
Resolves: #82239
Change-Id: I90d4ecdb4917c567a652a7bf5d24b55b39d646fd
Reviewed-on: https://review.typo3.org/53833


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>

typo3/sysext/core/Documentation/Changelog/8.1/Breaking-75454-LocalConfigurationDBConfigStructureHasChanged.rst

@@ -27,7 +27,7 @@ The new configuration array structure:
 				'host' => '127.0.0.1',
 				'port' => 3306,
 				'user' => 'typo3',
-				'socket' => '',
+				'unix_socket' => '',
 				'charset' => 'utf-8',
 			],
 		],