Look, a legitimate use of cat!

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This gets around strict compiler warnings.

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Add a unit test suite based on Check:

    https://libcheck.github.io/check/

The suite depends on the build system to automatically generate the code
stubs that call every test case.

httpdunit is automatically enabled in the build if configure is able to
find Check via pkg-config. At the moment pkg-config is the only official
(non-deprecated) way to build and link against Check with an autoconf
system, since platforms may distribute Check as a static library.

Note that Check is an LGPL'd library, so we can't distribute test
objects and binaries. Building and running the suite remains optional
and is not required to run the server.

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Just append to the list.

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For source files that exist in another directory, libtool will by
default put the output file in the current working directory instead of
next to the source file. Our build logic would then `touch` an empty
output file in the place where the actual output should have gone.

Replace the touch logic with an explicit -o option to libtool.

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As noted by Christophe Jaillet in the dev@ ml nested
if/elseif/else conditions are now evaluated. The code
change has been already backported to 2.4.x.



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Suggestion by wrowe. These files haven't changed in years; since we need
them anyway, check them in directly. buildconf will still copy over the
latest versions during setup, and SVN will tell us if there are any
changes (once I remove the svnignore).

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Patch by rjung.

The 1.1.0 compatibility macro for OpenSSL_malloc_init() causes problems
when mixed with procedure linkage stubs with some toolchains (e.g. GCC).
OpenSSL's malloc implementation doesn't recognize that the PLT stub
points back to it, which leads to infinite recursion.

Since the 1.1.0 documentation states that calling this function
explicitly is no longer necessary except "in certain shared-library
situations"(?), get rid of it.

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Add an explicit NULL to initialise a field in an authn_provider structure, as done in all other places.  PR 60636

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When processing a 'SetEnv' directive, warn if the environment variable name includes a '='. It is likely a configuration error.   PR 60249

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has been reclassified in current OpenSSL releases as WEAK due to 112
or fewer bits of remaining cipher strength, while the Sweet32 disclosure
extended the criticism of RC4 on to 3DES. (IDEA, which potentially has the
same issue, is never enabled by default in OpenSSL, due to patent concerns.)

This commit does not change default httpd behavior, but alters the suggested
behavior of newly provisioned httpd servers. Where adopted, XP with IE8 will
no longer handshake with mod_ssl (previously, XP with IE6 would not handshake.)
The same net effect occurs where OpenSSL is updated to 1.1.0.


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(present in 2.4.x CHANGES)



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This sentence has been discussed in the docs@
mailing list since it wasn't super clear for
some people. I propose to just remove it,
the rest of the content is already clear in
my opinion.



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update after mod_http2 backport



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mod_http2: fail requests without ERROR log in case we need to read interim
     responses and see only garbage. This can happen if proxied servers send
     data where none should be, e.g. a body for a HEAD request.



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(Why wasn't mod_ssl.html.en updated during my last build...?)

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Remove the bogus "none" and "n/a" type <override>s from the
documentation. If a directive can't be put in .htaccess, it shouldn't
have an <override> element.

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Based on feedback by elukey.

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This page pulls in directives that declare an <override> element and
groups them by class. The documentation for each class comes from
overrides.xml. Any undocumented classes are flagged with a boilerplate
fallback text (this situation is only likely to occur with a misspelling
or otherwise invalid <override> somewhere else in the documentation).

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mod_proxy_http2: update after backport



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