Get always encrypted support to actually work in PHP

[zippy1981]

Right now the monolog log handler is code complete in the features/phpSampleApp branch. All that is waiting is driver support.

• pdo_sqlsvr: It currently lacks AlwaysOn support. Microsoft promises this will be fixed in July.
• pdo_odbc: According to Microsoft I just need to add ColumnEncryption=Enabled; to the ODBC connection string for ODBC based applications to work.
• FreeTDS: It currently lacks AlwaysOnSupport. Even if it did work, PHP support is dubious at this point.