Disabled Naggle's algorithm in any_connection

[anarthal]

Fixes a performance issue with pipelines only containing close statement stages.

close #277

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 98.52%. Comparing base (0944b2a) to head (6c8f962).

Additional details and impacted files

[](https://app.codecov.io/gh/boostorg/mysql/pull/300?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) ```diff @@ Coverage Diff @@ ## develop #300 +/- ## =========================================== - Coverage 98.53% 98.52% -0.02% =========================================== Files 134 134 Lines 6480 6487 +7 =========================================== + Hits 6385 6391 +6 - Misses 95 96 +1 ``` | [Files](https://app.codecov.io/gh/boostorg/mysql/pull/300?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) | Coverage Δ | | |---|---|---| | [...clude/boost/mysql/impl/internal/variant\_stream.hpp](https://app.codecov.io/gh/boostorg/mysql/pull/300?src=pr&el=tree&filepath=include%2Fboost%2Fmysql%2Fimpl%2Finternal%2Fvariant_stream.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg#diff-aW5jbHVkZS9ib29zdC9teXNxbC9pbXBsL2ludGVybmFsL3ZhcmlhbnRfc3RyZWFtLmhwcA==) | `90.00% <85.71%> (-0.33%)` | :arrow_down: | ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/boostorg/mysql/pull/300?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/boostorg/mysql/pull/300?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg). Last update [0944b2a...6c8f962](https://app.codecov.io/gh/boostorg/mysql/pull/300?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg).