Compressed protocol support + extensibility for mysqlnd

Don't forget to update the length too

Have the lengths also to skip many calls to strlen

Count number of affected_rows for normal and PS queries

Fixing host info for TCP/IP and aligning mysqlnd and libmysql

Extending mysqlnd statistics/monitoring. Now counting COM_* commands.

Making mysqlnd emit no warnings when fetching pooled persistent connections that have timed out or are unusable for any other reason - bug #49761

Fixing problems when calling connect (again and again) on a valid connection handle. Most of the patch comes from Andrey.

Avoid buffer resizing and let the initial buffer allocation happen a couple of lines later with conn->m->set_client_option(conn, MYSQLND_OPT_NET_CMD_BUFFER_SIZE, ...). Andrey, I leave it to you to ch

Avoid buffer resizing and let the initial buffer allocation happen a couple of lines later with conn->m->set_client_option(conn, MYSQLND_OPT_NET_CMD_BUFFER_SIZE, ...). Andrey, I leave it to you to change the default size to 128k.

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Fixing pconnect statistics.

Increase the minimal size of the command buffer, which is used
for sending queries and in the future commpressed patch for reading
almost all packets from the wire instead of using stack buff

Increase the minimal size of the command buffer, which is used
for sending queries and in the future commpressed patch for reading
almost all packets from the wire instead of using stack buffers.

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revert the last change

count the queries

Use mnd_ wrappers wherever possible. Needed for
statistics.

Fix possible crash when conn is NULL

Fix and tests for bug #49511 . mysqlnd and the MySQL Client Library (libmysql) use different networking APIs. mysqlnd does use PHP streams whereas libmysql uses its own wrapper of the operating level

Fix and tests for bug #49511 . mysqlnd and the MySQL Client Library (libmysql) use different networking APIs. mysqlnd does use PHP streams whereas libmysql uses its own wrapper of the operating level network calls. PHP sets by default a read timeout of 60s for streams - php.ini, default_socket_timeout. This default applies to all streams that set no other timeout value. mysqlnd has not set any other value and therefore it connections of long running queries can have been cut off after default_socket_timeout seconds resulting in a 2006 - MySQL Server has gone away error message. The MySQL Client Library sets a default timeout of 365 * 24 * 3600 seconds (1year) and waits for other timeouts to happen, e.g. TCP/IP timeouts. mysqlnd now uses the same very long timeout. The value is configurable through a new php.ini setting: mysqlnd.net_read_timeout. mysqlnd.net_read_timeout gets used by any extension (ext/mysql, ext/mysqli, PDO_MySQL) that uses mysqlnd. mysqlnd tells PHP Streams to use mysqlnd.net_read_timeout. Please note that there may be subtle differences between MYSQL_OPT_READ_TIMEOUT from the MySQL Client Library and PHP Streams. E.g. MYSQL_OPT_READ_TIMEOUT is documented to work only for TCP/IP connections and, prior to MySQL 5.1.2, only for Windows. PHP streams may not have this limitation. Please check the streams documentation, if in doubt.

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Fixed bug #49027 (mysqli_options() doesn't work when using mysqlnd)

- MFH: Removed UG(unicode) checks

- MFH: Improve mysqlnd's internal method registration

MFH: Bump copyright year, 3 of 3.

MFH:
Windows fixes for mysqlnd
Less warnings + PHPAPI for mysqlnd_poll

MFH:
Fix a small bug that mysqlnd::next_result didn't care about an error in a
multi-statement. In an inner layer the error has been already set, thus it
needed better massage on the top

MFH:
Fix a small bug that mysqlnd::next_result didn't care about an error in a
multi-statement. In an inner layer the error has been already set, thus it
needed better massage on the top level.

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MFH: Fix Windows build, pure C compiler

MFH:
Asynchronous queries for mysqli, when mysqlnd is enabled.
Includes 4 tests for mysqli_poll

MFH:
Get rid of many defines (which simplifies the code a lot),
as well as uint->unsigned int