Log Message:
Changes with Apache 2.4.26

  *) HTTP/2 support no longer tagged as "experimental" but is instead \ 
considered
     fully production ready.

  *) mod_http2: Fix for possible CPU busy loop introduced in v1.10.3 where a \ 
stream may keep
     the session in continuous check for state changes that never happen.

  *) mod_mime: Fix error checking for quoted pairs.

  *) mod_proxy_wstunnel: Add "upgrade" parameter to allow upgrade to other
     protocols.

  *) MPMs unix: Place signals handlers and helpers out of DSOs to avoid
     a possible crash if a signal is caught during (graceful) restart.

  *) core: Deprecate ap_get_basic_auth_pw() and add
     ap_get_basic_auth_components().

  *) mod_rewrite: When a substitution is a fully qualified URL, and the
     scheme/host/port matches the current virtual host, stop interpreting the
     path component as a local path just because the first component of the
     path exists in the filesystem.  Adds RewriteOption \ 
"LegacyPrefixDocRoot"
     to revert to previous behavior.

  *) core: ap_parse_form_data() URL-decoding doesn't work on EBCDIC
     platforms.

  *) ab: enable option processing for setting a custom HTTP method also for
     non-SSL builds.

  *) core: EBCDIC fixes for interim responses with additional headers.

  *) mod_ssl: Consistently pass the expected bio_filter_in_ctx_t
     to ssl_io_filter_error().

  *) mod_env: when processing a 'SetEnv' directive, warn if the environment
     variable name includes a '='. It is likely a configuration error.

  *) Evaluate nested If/ElseIf/Else configuration blocks.

  *) mod_rewrite: Add 'BNP' (backreferences-no-plus) flag to RewriteRule to
     allow spaces in backreferences to be encoded as %20 instead of '+'.

  *) mod_rewrite: Add the possibility to limit the escaping to specific
     characters in backreferences by listing them in the B flag.

  *) mod_substitute: Fix spurious AH01328 (Line too long) errors on EBCDIC
     systems.

  *) 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.

more...