Update cheatsheets

openssl

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# openssl
+
+> OpenSSL cryptographic toolkit.
+> Some subcommands such as `openssl req` have their own usage documentation.
+> More information: <https://www.openssl.org>.
+
+- Display help:
+
+`openssl help`
+
+- Display help for a specific subcommand:
+
+`openssl help {{x509}}`
+
+- Display version:
+
+`openssl version`