Compare by the dotted decimal notation rather than the NID.

OpenSSL::ASN1::ObjectId can store OIDs that are not registered in
OpenSSL's internal table. NID is not defined for such an OID, but it is
not an error.

The == method also should not raise TypeError if the other object is
not an instance of OpenSSL::ASN1::ObjectId.

Fixes: https://github.com/ruby/openssl/issues/791

This commit fixes the following errors in the tests.
Because the OpenSSL project changed the code to make the time string format
without second invalid. So, we drop the assertions.

```
1) Error: test_generalizedtime(OpenSSL::TestASN1): OpenSSL::ASN1::ASN1Error: generalizedtime is too short
/home/runner/work/ruby-openssl/ruby-openssl/test/openssl/test_asn1.rb:698:in `decode'
/home/runner/work/ruby-openssl/ruby-openssl/test/openssl/test_asn1.rb:698:in `decode_test'
/home/runner/work/ruby-openssl/ruby-openssl/test/openssl/test_asn1.rb:433:in `test_generalizedtime'
     430:       OpenSSL::ASN1::GeneralizedTime.new(Time.utc(9999, 9, 8, 23, 43, 39))
     431:     # LibreSSL 3.6.0 requires the seconds element
     432:     return if libressl?
  => 433:     decode_test B(%w{ 18 0D }) + "201612081934Z".b,
     434:       OpenSSL::ASN1::GeneralizedTime.new(Time.utc(2016, 12, 8, 19, 34, 0))
     435:     # not implemented
     436:     # decode_test B(%w{ 18 13 }) + "https://github.com/ruby/openssl/commit/201612081934+0930".b,

2) Error: test_utctime(OpenSSL::TestASN1): OpenSSL::ASN1::ASN1Error: utctime is too short
/home/runner/work/ruby-openssl/ruby-openssl/test/openssl/test_asn1.rb:698:in `decode'
/home/runner/work/ruby-openssl/ruby-openssl/test/openssl/test_asn1.rb:698:in `decode_test'
/home/runner/work/ruby-openssl/ruby-openssl/test/openssl/test_asn1.rb:411:in `test_utctime'
     408:     end
     409:     # Seconds is omitted. LibreSSL 3.6.0 requires it
     410:     return if libressl?
  => 411:     decode_test B(%w{ 17 0B }) + "1609082343Z".b,
     412:       OpenSSL::ASN1::UTCTime.new(Time.utc(2016, 9, 8, 23, 43, 0))
     413:     # not implemented
     414:     # decode_test B(%w{ 17 11 }) + "https://github.com/ruby/openssl/commit/500908234339+0930".b,
```

https://github.com/ruby/openssl/commit/2e826d5715

Commit https://github.com/ruby/openssl/commit/af895bc5596b ("asn1: avoid truncating OID in
OpenSSL::ASN1::ObjectId#oid", 2016-12-15) added this test case.

The OBJ_obj2txt() issue was fixed by LibreSSL 2.5.1 (released in 2017)
and is no longer relevant today.

https://github.com/ruby/openssl/commit/6a188f1a29

LibreSSL 3.6.0 expects the seconds part in UTCTime and GeneralizedTime
to be always present. LibreSSL 3.6.0 release note [1] says:

> - The ASN.1 time parser has been refactored and rewritten using CBS.
>   It has been made stricter in that it now enforces the rules from
>   RFC 5280.

[1] https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.6.0-relnotes.txt

https://github.com/ruby/openssl/commit/bbc540fe83

Systems such as RHEL 9 are moving away from SHA1
disabling it completely in default configuration.

https://github.com/ruby/openssl/commit/32648da2f6

https://github.com/ruby/openssl/commit/708ebf2f7a

Clean up old version guards in preparation for the upcoming OpenSSL 3.0
support.

OpenSSL 1.0.1 reached its EOL on 2016-12-31. At that time, we decided
to keep 1.0.1 support because many major Linux distributions were still
shipped with 1.0.1. Now, nearly 4 years later, most Linux distributions
are reaching their EOL and it should be safe to assume nobody uses them
anymore. Major ones that were using 1.0.1:

 - Ubuntu 14.04 is EOL since 2019-04-30
 - RHEL 6 will reach EOL on 2020-11-30

LibreSSL 3.0 and older versions are no longer supported by the LibreSSL
team as of October 2020.

Note that OpenSSL 1.0.2 also reached EOL on 2019-12-31 and 1.1.0 also
did on 2018-08-31.

https://github.com/ruby/openssl/commit/c055938f4b

https://github.com/ruby/openssl/commit/b28fb2f05c

Import the master branch of ruby/openssl for preparing to release openssl-2.2.0