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- further improvements for renegotiation
No more test suite failures for reneg,
but still using not so nice polling.


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- missing semicolons
- s/req/r/

Followup to r1729901


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ap_get_remote_host() in most applications, but preserve the original
behavior for all ap_get_remote_host() consumers (mostly, because we
don't have the request_rec in the first place, and also to avoid any
unintended consequences).

This accessor continues to store the remote_host of connection based
uesr agents within the conn_rec for optimization.  Only where some
other module modifies the useragent_addr will we perform a per-request
query of the remote_host.

(Committed previously, but backed out due to unrelated core.c changes)


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ap_get_remote_host() in most applications, but preserve the original
behavior for all ap_get_remote_host() consumers (mostly, because we
don't have the request_rec in the first place, and also to avoid any
unintended consequences).

This accessor continues to store the remote_host of connection based
uesr agents within the conn_rec for optimization.  Only where some
other module modifies the useragent_addr will we perform a per-request
query of the remote_host.



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had to be issued because the remote closed the previous/reusable one
during idle (keep-alive) time.


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construction for error handling/jump (as suggested by Ruediger).

Hence we can move backend->close = 1 (for mod_proxy_wstunnel) and
proxy_run_detach_backend() (for mod_proxy_http2) in the cleanup fallback.


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giving write operations a chance after a max of 64k has been read, not entering async keepalive before first request is seen

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