Revert `OPENSSL_VERSION_NUMBER` status bits back to 0 for all 3.x releases including 3.6

[esyr]

The reasons for revert:

• the issue[1] was originally reported as a result of writing new code[2], not a problem with the existing one;
• another reference[3] de-facto excludes only 3.0.0/3.0.1 releases which are now irrelevant;
• the change has broken existing code[4];
• 3.5.3 is fresh and its usage is low, as opposing to all 3.x releases with 0x0 in the status bits, that were like that for years.

Additional points of consideration:

• nodejs (and possibly nginx) are to be notified about the revert, in order to avoid causing even more issues;
• would be nice to document the discrepancy between opensslv.h comment and documentation in the HISTORY section of OpenSSL_version(3ossl).

[1] openssl/openssl#28227
[2] nodejs/node#59436
[3] nginx/nginx@a5ca38f
[4] openssl/openssl#28575

[t8m]

If we revert, we should also change the opensslv.h comment to make it clear that the last nibble should be ignored.

[levitte]

And please, do not actually revert to what was there previously. Here's a more proper "revert" diff:

diff --git a/include/openssl/opensslv.h.in b/include/openssl/opensslv.h.in
index e547281ff5..85e698704d 100644
--- a/include/openssl/opensslv.h.in
+++ b/include/openssl/opensslv.h.in
@@ -89,12 +89,12 @@ extern "C" {
 
 # define OPENSSL_VERSION_TEXT "OpenSSL {- "$config{full_version} $config{release_date}" -}"
 
-/* Synthesize OPENSSL_VERSION_NUMBER with the layout 0xMNN00PPSL */
+/* Synthesize OPENSSL_VERSION_NUMBER with the layout 0xMNN00PP0L */
 # define OPENSSL_VERSION_NUMBER          \
     ( (OPENSSL_VERSION_MAJOR<<28)        \
       |(OPENSSL_VERSION_MINOR<<20)       \
       |(OPENSSL_VERSION_PATCH<<4)        \
-      |{- @config{prerelease} ? "0x0L" : "0xfL" -} )
+      |0x0L )
 
 # ifdef  __cplusplus
 }

[richardlau]

• nodejs (and possibly nginx) are to be notified about the revert, in order to avoid causing even more issues;

As the reporter of openssl/openssl#28227 Node.js should be okay with the status bits as 0 as that is what we had to change nodejs/node#59436 to use to work correctly across the different OpenSSL 3.x versions out there in the wild. The report was mainly a courtesy one as the comments in opensslv.h didn't look possible.