Update copyright headers to 2017

Fix ASSERT logic

Bugfix 72791: fix memory leak in PDO persistent connections

Fix bug 72788: Invalid memory access when database_object_handle
is undefined. Also fix memory leak in dbh_free when using persistent
PDO connections.

Fix bug #52098

Fixed warning of incompatible pointer

Avoid incomplete zend_internal_function initialization.

Do not edit the value in place (might be relates to #71261)

Happy new year (Update copyright to 2016)

Fix bug #64172

Check if the SQLSTATE error code is equal to PDO_ERR_NONE before we ask the driver.
And if no error is reported skip the extra call to the driver.

Fix bug #64172

Check if the SQLSTATE error code is equal to PDO_ERR_NONE before we ask the driver.
And if no error is reported skip the extra call to the driver.

Cleanup: removed deprecated commented code. Incorrect zval_dtor() usage replaced by zval_dtor_ptr().

Fixed bug #70389 (PDO constructor changes unrelated variables)

Fixed bug #70221 (persistent sqlite connection + custom function segfaults)

Use ZSTR_ API to access zend_string elements (this is just renaming without semantick changes).

Expose pdo stmt ctor args to gc

These very commonly contain a reference to the PDO object itself.

Use fast method to check if first arguments should be passed by reference (not tested onbig endian).

Fix leak of Pdo object if query() fails

Decref the DBH object when storing the errored query statement --
the DBH owns the stmt, so it will live long enough.

Fix EH_THROW replacement in PDO constructor

Needs to happen for the "goto options" case as well, otherwise
will try to restore error handling that was never replaced.

Always throw TypeException on throwing zpp failures

Introduces a ZEND_PARSE_PARAMS_THROW flag for zpp, which forces to
report FAILURE errors using a TypeException instead of a Warning,

Always throw TypeException on throwing zpp failures

Introduces a ZEND_PARSE_PARAMS_THROW flag for zpp, which forces to
report FAILURE errors using a TypeException instead of a Warning,
like it would happen in strict mode.

Adds a zend_parse_parameters_throw() convenience function, which
invokes zpp with this flag.

Converts all cases I could identify, where we currently have
throwing zpp usage in constructors and replaces them with this API.
Error handling is still replaced to EH_THROW in some cases to handle
other, domain-specific errors in constructors.

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Try fixing PDO MySQL pconnect test

Use less aggressive conversion to exceptions, in particular
do not convert warnings that happen during check_liveness. If the
server has gone away

Try fixing PDO MySQL pconnect test

Use less aggressive conversion to exceptions, in particular
do not convert warnings that happen during check_liveness. If the
server has gone away this will just reconnect and we still end up
with a valid connection, so it shouldn't throw.

Also drop some unnecessary checks for malloc returning NULL.

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Convert fatal errors into EngineExceptions
Make zval_update_constant_ex(), zval_update_constant(), zend_update_class_constants() and zend_ast_evaluate() return SUCCESS or FAILURE.

Patch improvement:

Removed the corresponding core code.
Fixed ext/com_dotnet and ext/date.
Refactored ext/intl changes.
Improved ext/fileinfo and ext/pdo changes.
Fixed tests.

Fixed PDO constructor to not return null.

Move zend_object->guards into additional slot of zend_object->properties_table[]. As result size of objects without __get/__set/__unset/__isset magic methods is reduced.