Instead of handling shebang lines by adjusting the file pointer in
individual SAPIs, move the handling into the lexer, where this is
both a lot simpler and more robust. Whether the shebang should be
skipped is controlled by CG(skip_shebang) -- we might want to do
that in more cases.

This fixed bugs #60677 and #78066.

This patch follows previous license year ranges updates. With new
approach source code files now have simplified headers with license
information without year ranges.

sapi/tests/ has been introduced as a generic means to test different
SAPIs[1].  run-tests2.php has later be renamed to server-tests.php and
recently been dropped[2].  However, the sapi/tests/test00?.php test
cases remained, even though they make no sense for run-tests.php,
since they use an unsupported format for the `--ENV--` section and the
completely unsupported `--HEADERS--` section, respectively.  While
these tests ran successfully under run-tests.php, that was only by
accident, and they did not really test something useful.  Therefore, we
remove these tests altogether.

sapi/tests/bug69487.phpt is actually a CGI test (CGI is enforced due to
the `--POST--` section), so we move it to sapi/cgi/tests, which leaves
sapi/tests/ empty.  Thus, we also remove the sapi/ directory from
run-tests.php.

Finally, we remove the `--HEADERS--` and `--REQUEST--` sections from
the list of allowed run-tests.php sections.

[1] <http://git.php.net/?p=php-src.git;a=commit;h=b671380b6b5b6e1f4f235e810afa4199e989d2ba>
[2] <http://git.php.net/?p=php-src.git;a=commit;h=4f36acb9e65935aa657f1f22e2320a401bdbdad3>

* PHP-7.3:
  Fix #76954: apache_response_headers removes last character from header name

* PHP-7.2:
  Fix #76954: apache_response_headers removes last character from header name

* PHP-7.1:
  Fix #76954: apache_response_headers removes last character from header name