Adding comments to .ini files at philip@php.net's request.

php.ini-dist

@@ -550,9 +550,11 @@ default_socket_timeout = 60
 ; extension_dir directive above.
 
 
-;Windows Extensions
-;Note that ODBC support is built in, so no dll is needed for it.
-;
+; Windows Extensions
+; Note that ODBC support is built in, so no dll is needed for it.
+; Note that many DLL files are located in the extensions/ (PHP 4) ext/ (PHP 5)
+; extension folders as well as the separate PECL DLL download (PHP 5).
+; Be sure to appropriately set the extensions_dir directive.
 
 ;extension=php_bz2.dll
 ;extension=php_cpdf.dll

php.ini-recommended

@@ -608,9 +608,11 @@ default_socket_timeout = 60
 ; extension_dir directive above.
 
 
-;Windows Extensions
-;Note that ODBC support is built in, so no dll is needed for it.
-;
+; Windows Extensions
+; Note that ODBC support is built in, so no dll is needed for it.
+; Note that many DLL files are located in the extensions/ (PHP 4) ext/ (PHP 5)
+; extension folders as well as the separate PECL DLL download (PHP 5).
+; Be sure to appropriately set the extensions_dir directive.
 
 ;extension=php_bz2.dll
 ;extension=php_cpdf.dll