Revert "igbinary support through a dedicated package"

This reverts commit ab23cf5c3c01f46db87820c95de3b8fcd320c656.
Revert "Switches libmysqlclient/mysqlnd apache2/cgi build options to include mysqlnd.h in php5-dev"

This reverts commit 746ae4864bfc02f71705dbc7c310f12d90a6bd30.
New 5.4.11 changelog - igbinary and mysqlnd.h fixes have been postponed