[ticket/15424] Multiple typo fixes in docs & comments

Fixed typos in some docs, guidelines, some non-user-facing files.

PHPBB3-15424

phpBB/phpbb/search/fulltext_mysql.php

@@ -150,7 +150,7 @@ class fulltext_mysql extends \phpbb\search\base
 	/**
 	* Checks for correct MySQL version and stores min/max word length in the config
 	*
-	* @return string|bool Language key of the error/incompatiblity occurred
+	* @return string|bool Language key of the error/incompatibility occurred
 	*/
 	public function init()
 	{

phpBB/phpbb/search/fulltext_native.php

@@ -339,7 +339,7 @@ class fulltext_native extends \phpbb\search\base
 			$this->db->sql_freeresult($result);
 		}
 
-		// Handle +, - without preceeding whitespace character
+		// Handle +, - without preceding whitespace character
 		$match		= array('#(\S)\+#', '#(\S)-#');
 		$replace	= array('$1 +', '$1 +');
 

phpBB/phpbb/search/fulltext_postgres.php

@@ -173,7 +173,7 @@ class fulltext_postgres extends \phpbb\search\base
 	/**
 	* Checks for correct PostgreSQL version and stores min/max word length in the config
 	*
-	* @return string|bool Language key of the error/incompatiblity occurred
+	* @return string|bool Language key of the error/incompatibility occurred
 	*/
 	public function init()
 	{

phpBB/phpbb/search/fulltext_sphinx.php

@@ -18,7 +18,7 @@ define('SPHINX_CONNECT_RETRIES', 3);
 define('SPHINX_CONNECT_WAIT_TIME', 300);
 
 /**
-* Fulltext search based on the sphinx search deamon
+* Fulltext search based on the sphinx search daemon
 */
 class fulltext_sphinx
 {
@@ -210,7 +210,7 @@ class fulltext_sphinx
 	/**
 	* Checks permissions and paths, if everything is correct it generates the config file
 	*
-	* @return string|bool Language key of the error/incompatiblity encountered, or false if successful
+	* @return string|bool Language key of the error/incompatibility encountered, or false if successful
 	*/
 	public function init()
 	{