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Be more consistent in <highlight> block layout in XML.
No visual change (r1750441 in trunk)

Synch with trunk (mainly <highlight> block layout)
Do not use " around parameters in syntax

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Backports: r1749924
Submitted by: wrowe
Reviewed by: rpluem, ylavic



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of only 'few' or 'none' as fatal, but continue the ./configure

Submitted by: trawick
Backports: r1396440 [only the acinclude.m4, config5.m4 change was N/A]
Reviewed by: wrowe, rpluem, ylavic



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Generate mod_proxy_http2 HTML files.

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Simplify, and correct the dependency handling of mod_proxy_hcheck

Cause missing mod_watchdog to 'unset' the --enable-proxy default, rather than
disable the module. This forces the module logic to emit a warning of the
missing dependency; changes the output from

checking whether to enable mod_proxy_hcheck... no

to

configure: WARNING: "mod_watchdog is disabled but required for mod_proxy_hcheck"
checking whether to enable mod_proxy_hcheck... no (disabled)



Submitted by: wrowe
Reviewed/backported by: jim


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Support multiple module dependencies for the final prereq argument to the
APACHE_MODULE macro, as a comma separated list, e.g.

APACHE_MODULE(proxy_http2, [...], [proxy,http2])

will evaluate the availability of mod_proxy, followed by mod_http2

Submitted by: wrowe
Reviewed/backported by: jim


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mod_http2: fixing APLOG_NO overdose and some log levels


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assign IDs to new AH*'s



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spatch some AH* IDs to pick up the new INFO level messages,
also hit old DEBUG messages.




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mod_proxy_http2: fixed retry behaviour when proxy engine needs to retry its base request on a new connection



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