Signed-off-by: Ezra Chung <ezra.chung@mongodb.com>

* Update bundled zlib to 1.2.12 [Close CDRIVER-4377]

badQueries is not included in C driver tests due to CDRIVER-4332.

Signed-off-by: Jesse Williamson <jesse.williamson@mongodb.com>

Signed-off-by: Ezra Chung <ezra.chung@mongodb.com>

* Bump WIRE_VERSION_MIN from 3 to 6

* Assert request parameter for mock_server_replies_to_find() is not null

* Update error message for failing to satisfy minimum wire version

* Remove Evergreen tasks requiring server version below 3.6

* Update mock servers to forbid max_wire_version < 6

* Update test code conditioned on wire version < 6

* Replace wire version integer literals with feature macros

* Replace wire versions in string literals with feature macros

* Add mock_server_receives_bulk_msg()

* Update mock_server_recieves_command() -> mock_server_recieves_msg()

* Allow readPreference:secondary with $merge and $out. [Finish CDRIVER-3893, CDRIVER-4224, and CDRIVER-4195]
* Pass around the effectively chosen read mode used in server selection back to the command builder
* Update doc func name
* Fix duplicate doc comments
* Consolidate duplicate state in suitable_servers()
* Less magic numbers
* Clarify wire version checks
* Force primary read preference if talking to a single server older than 5.0

* New random generation of OID values [Fixes CDRIVER-4231]

* Restore hashing of machine attributes, plus an atomic init-counter,
  plus the process ID.
* Instead of MD5 hashing, use SipHash.
* No more magic numbers, make bson-context -Wconversion clean, comment what's happening in the random init.
* Remove old deprecated docs and no-op tests.
* Host name mocking is gone

* Remove test suite signal handlers for C90 compatibility
* Replace snprintf with bson_snprintf
* Address missing _InterlockedExchangePointer on x86 with VS 2013

* Address extra semicolon warnings
* Address incompatible pointer and signedness warnings for old GCC versions

Co-authored-by: Kevin Albertson <kevin.albertson@mongodb.com>

* Remove deprecated feature test macro _BSD_SOURCE
* Reduce language extensions to those specified by _DEFAULT_SOURCE
* Apply _DEFAULT_SOURCE to all subdirectories
* Remove explicit feature test macros from Evergreen tasks
* Address missing inclusion of unistd.h during zlib bundle compilation

Introduces new mongoc_client_new_from_uri_with_error and mongoc_client_pool_new_with_error methods. Also addresses topology leak in mongoc_client_new_from_uri (CDRIVER-4251).

* Remove redundant warnings about unused results

* Explain why we need not handle null result from _mongoc_client_new_from_topology

* Log URI errors in mongoc_client_new as warnings

* Clear logs between /Client/max_staleness assertions

* Set error instead of logging in mongoc_client_pool_new_with_error

* Remove test expecting a client with an invalid topology

* Revise assertions in /loadbalanced/client_uri_validation test

This no longer requires constructing a client and expecting an error through server selection.

* Use tracing macro for return statement

* Check MONGOC_ENABLE_SSL in mongoc_client_new_from_uri_with_error

Moving the check up from _mongoc_client_new_from_topology makes mongoc_client_new_from_uri_with_error consistent with mongoc_client_pool_new_with_error. Additionally, we add log message assertions to corresponding tests.

* Anticipate null pool or client in SRV error tests

* Remove obsolete tests for invalid LB topologies

These tests were previously introduced in CDRIVER-4184 but no longer apply now that we prohibit construction of clients and pools with an invalid topology.

* _mongoc_client_new_from_topology should require a valid topology

* Document precondition for _mongoc_client_new_from_topology

Co-authored-by: Ezra Chung <88335979+eramongodb@users.noreply.github.com>
Co-authored-by: Kevin Albertson <kevin.albertson@mongodb.com>

* Update MONGOC_URI_SRVMAXHOSTS to lowercase for consistency
* Add support for parsing URI option srvServiceName
* Update spec tests for srvServiceName
* Add documentation for mongoc_uri_get_srv_service_name()
* Add support for srvServiceName in DNS seedlist discovery
* Add mongoc_uri_get_srv_hostname()
* Replace and rename SRV "service" with "hostname"

* Warn and ignore exhaust cursor option given server 5.1 or newer
* Unconditionally use OP_MSG for find command given server 5.1 or newer
* Unconditionally use OP_MSG for getMore command given server 5.1 or newer
* Avoid unnecessary exhaust cursor in /counters/op_msg test
* Document exhaust option behavior for find command
* Add /Client/exhaust_cursor/fallback test for server 5.1 and newer