Implemented request #62055 (Make run-tests.php support --CGI-- sections)

Not regarding the CGI section might even been seen as a bug, and since
server-tests.php appears to broken, anway[1][2], we implement it for
run-tests.php in the way as described[3] for server-tests.php, i.e.
respective tests are skipped if no CGI executable is found.

[1] <#222 (comment)>
[2] <#1811 (comment)>
[3] <https://qa.php.net/phpt_details.php#cgi_section>

Author: cmb69

NEWS

@@ -119,6 +119,10 @@ PHP                                                                        NEWS
   . Fixed unzserialize(), to disable creation of unsupported data structures
     through manually crafted strings. (Dmitry)
 
+- Testing:
+  . Implemented request #62055 (Make run-tests.php support --CGI-- sections).
+    (cmb)
+
 - Zlib:
   . Added zlib/level context option for compress.zlib wrapper. (Sara)
 

run-tests.php

@@ -1406,7 +1406,7 @@ function run_test($php, $file, $env)
 	$tested = trim($section_text['TEST']);
 
 	/* For GET/POST/PUT tests, check if cgi sapi is available and if it is, use it. */
-	if (!empty($section_text['GET']) || !empty($section_text['POST']) || !empty($section_text['GZIP_POST']) || !empty($section_text['DEFLATE_POST']) || !empty($section_text['POST_RAW']) || !empty($section_text['PUT']) || !empty($section_text['COOKIE']) || !empty($section_text['EXPECTHEADERS'])) {
+	if (array_key_exists('CGI', $section_text) || !empty($section_text['GET']) || !empty($section_text['POST']) || !empty($section_text['GZIP_POST']) || !empty($section_text['DEFLATE_POST']) || !empty($section_text['POST_RAW']) || !empty($section_text['PUT']) || !empty($section_text['COOKIE']) || !empty($section_text['EXPECTHEADERS'])) {
 		if (isset($php_cgi)) {
 			$old_php = $php;
 			$php = $php_cgi . ' -C ';