Fixes: c198b0ce ("test: fix util/getaddrinfo for netbsd")
Fixes: #1316

In it's current form, libevent requires multiple struct evhttp objects to be created in order to enable listening on sockets with more than one type of encryption.

This change allows specifying per-socket how the associated bufferevents should be created.
Thus, it becomes possible to have multiple listening sockets with different encryption parameters using only one evttp.

Fixes: #1316

Deleted usage of CMake feature 'file(REAL_PATH'
which is available from version 3.19
with an old 'get_filename_component' so that
older version of CMake can still be used
to configure the project.

Co-authored-by: Azat Khuzhin <azat@libevent.org>
v2: remove handling of HTTP_BIND_IPV6

There can be issues on 32-bit architectures to mmap 2+GiB file, and to
make this portable between different version of glibc, mmap64 was
prefered over _FILE_OFFSET_BITS

ci/linux skip
ci/macos skip
ci/windows skip
ci/mingw skip

Right now it is possible for some tests to fail, because of lack of CPU
time.
And it is better to have green CI even if this will take longer.

* ci-tsan-recent:
  test: fix unused variable in rand test (catched by newer clang)
  ci: use ubuntu 22.04 with clang 11 for sanitizers build

There are periodically some heap-use-after-free reported in ratelim
tests by TSan, which I cannot reproduce locally and even on CI it is
flaky.

Let's try to use recent clang, maybe it fixes some issues in sanitizers.

Refs: #1206

Fixes: #1304

Right now because we have separate workflows there is no one page with
all the jobs, instead we have separate page for each workflow (linux,
windows, ...)

This is pretty inconvenient, so let's make it cleaner, and now we will
have only two:

- for pull requests
- for upstream/master

Previously evdns was using HOST_NAME_MAX, and define it to 255 *only* if
it not set, however it does set on linux:

    $ egrep -r define.*HOST_NAME_MAX /usr/include/bits
    /usr/include/bits/local_lim.h:#define HOST_NAME_MAX             64
    /usr/include/bits/posix1_lim.h:#define _POSIX_HOST_NAME_MAX     255
    /usr/include/bits/confname.h:#define _SC_HOST_NAME_MAX          _SC_HOST_NAME_MAX

But 64 should be the limit of the host component, not for the whole
hostname, as also noted by @ploxiln

So use our own EVDNS_NAME_MAX const, which is set to 255.

Fixes: #1280

Fixes: #1271
Follow-up for: 90bcf2d6

Refs: #1228

Since [1] github actions official support skipping workflows based on
the message.

  [1]: https://github.blog/changelog/2021-02-08-github-actions-skip-pull-request-and-push-workflows-with-skip-ci/

Public CI workers has pretty high load, and sometimes you need to test
only specific workflow, i.e. windows.

So let's add ability to limit which workflow should be run.

* openssl-3:
  ci: use ubuntu 22.04 with OpenSSl 3.0 instead of building OpenSSL from sources
  ci: set LD_LIBRARY_PATH for openssl 3.0 build
  test: suppress warning for already defined SSL_get_peer_certificate
  autotools: print $OPENSSL_LIBS/$OPENSSL_INCS
  Suppress -Wunused-value for BIO_set_close()
  Use OPENSSL_VERSION_NUMBER over OPENSSL_VERSION_MAJOR (for compatibility)
  Attempt to add OpenSSL 3 to the Linux build matrix
  Initial OpenSSL 3.0 support

Fixes:

    /home/runner/work/libevent/libevent/build/test/.libs/regress: error while loading shared libraries: libssl.so.3: cannot open shared object file: No such file or directory

build report:

    [1/2] Building C object CMakeFiles/regress.dir/test/regress_mbedtls.c.o
    /src/le/libevent/test/regress_mbedtls.c:50: warning: "SSL_get_peer_certificate" redefined
       50 | #define SSL_get_peer_certificate mbedtls_ssl_get_peer_cert
          |
    In file included from /src/le/libevent/test/regress.h:139,
                     from /src/le/libevent/test/regress_mbedtls.c:35:
    /src/oss/openssl/include/openssl/ssl.h:1799: note: this is the location of the previous definition
     1799 | #   define SSL_get_peer_certificate SSL_get1_peer_certificate
          |
    [2/2] Linking C executable bin/regress

But this should be cleaned up.

Since OpenSSL 3.0 there is new OPENSSL_VERSION_MAJOR, but previous
releases does not have it.

So let's use plain old OPENSSL_VERSION_NUMBER to avoid more preprocessor
macros.

v2: fix echo messages
v3: fix autotools build (wrong path to pkg config)

* Don't use deprecated functions when building against OpenSSL 3.0.
* Recognise that OpenSSL 3.0 can signal a dirty shutdown as a protocol.
  error in addition to the expected IO error produced by OpenSSL 1.1.1
* Update regress_mbedtls.c for compatibility with OpenSSL 3

* mbedtls-3:
  sample/ssl-client-mbedtls.c: fix for MbedTLS 3
  sample/ssl-client-mbedtls.c: break the loop on EOF
  sample/ssl-client-mbedtls.c: fix printing response in readcb
  Initial Mbed-TLS 3 support to get the GitHub Actions working again
  Support build dir of the MbedTLS