[Sync-En] fix: use strict comparisons of returns in openssl_verify examples (#4827) - #1229

Fixes #1215

Sync with EN commit 9e5f75b8c1d87da6ee825ae7d1b2a3da218b5c69.

• Add warnings to openssl_verify(), openssl_x509_verify(), openssl_pkcs7_verify(), openssl_x509_checkpurpose(), ldap_compare(), and ZipArchive::getArchiveFlag() explaining that both the success value and -1 are truthy, so a plain truth test treats an error as a positive result
• Fix examples in openssl_verify() to use strict comparisons (=== instead of ==)
• Fix example in openssl_x509_verify() to use strict comparison