less serious compatAbility fixes

Zend/ZEND_CHANGES

@@ -1136,7 +1136,7 @@ Changes in the Zend Engine 1.0
       (supports breakpoints, expression evaluation, step-in/over,
       function call backtrace, and more).
 
-  The Zend Engine claims 100% compatability with the engine of PHP
+  The Zend Engine claims 100% compatibility with the engine of PHP
   3.0, and is shamelessly lying about it. Here's why:
 
     * Static variable initializers only accept scalar values
@@ -1161,6 +1161,6 @@ Changes in the Zend Engine 1.0
       printed the letter { and the contents of the variable $somevar in
       PHP 3.0), it will result in a parse error with the Zend Engine.
       In this case, you would have to change the code to print
-      "\{$somevar"; This incompatability is due to the full variable
+      "\{$somevar"; This incompatibility is due to the full variable
       reference within quoted strings feature added in the Zend
       Engine.

ext/mysql/php_mysql.c

@@ -296,7 +296,7 @@ static const zend_function_entry mysql_functions[] = {
 #ifdef MYSQL_HAS_SET_CHARSET
 	PHP_FE(mysql_set_charset,							arginfo_mysql_set_charset)
 #endif
-	/* for downwards compatability */
+	/* for downwards compatibility */
 	PHP_DEP_FALIAS(mysql,				mysql_db_query,		arginfo_mysql_db_query)
 	PHP_DEP_FALIAS(mysql_fieldname,		mysql_field_name,	arginfo_mysql_field_name)
 	PHP_DEP_FALIAS(mysql_fieldtable,	mysql_field_table,	arginfo_mysql_field_seek)

ext/sockets/sockets.c

@@ -344,7 +344,7 @@ const zend_function_entry sockets_functions[] = {
 	PHP_FE(socket_recvmsg,			arginfo_socket_recvmsg)
 	PHP_FE(socket_cmsg_space,		arginfo_socket_cmsg_space)
 
-	/* for downwards compatability */
+	/* for downwards compatibility */
 	PHP_FALIAS(socket_getopt, socket_get_option, arginfo_socket_get_option)
 	PHP_FALIAS(socket_setopt, socket_set_option, arginfo_socket_set_option)
 

ext/sqlite3/php_sqlite3_structs.h

@@ -23,7 +23,7 @@
 
 #include <sqlite3.h>
 
-/* for backwards compatability reasons */
+/* for backwards compatibility reasons */
 #ifndef SQLITE_OPEN_READONLY
 #define SQLITE_OPEN_READONLY 0x00000001
 #endif

ext/standard/url.c

@@ -266,7 +266,7 @@ PHPAPI php_url *php_url_parse_ex(char const *str, int length)
 		p = s;
 	} else {
 		/* memrchr is a GNU specific extension
-		   Emulate for wide compatability */
+		   Emulate for wide compatibility */
 		for(p = e; *p != ':' && p >= s; p--);
 	}