ssltestgen: Add script to generate local test ssl key+crt.

[cederom]

Summary

• Sometimes a HTTPS version of the site needs to be tested locally before PR is submitted (i.e. to detect HTTP hardcoded links and/or components from external sites ).
• This script genrates local testing SSL key and certificate using openssl. No external tools or sites needs to be used.
• Enter key password (used to sign crt and launch srv) and cert details. Then: bundle exec jekyll serve --ssl-cert server.crt --ssl-key server.key.

Impact

• Only local testing when HTTPS/SSL also needs to be tested this script provides quickest possible way to generate self-signed certificate locally.
• No external tools or sites needs to be used.

Testing

Tested on FreeBSD 14.3:

1. Generate ssl server.key + server.crt:

% ./ssltestgen.sh
Enter PEM pass phrase:
Verifying - Enter PEM pass phrase:
Enter pass phrase for server.key:
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:PL
State or Province Name (full name) [Some-State]:WAW
Locality Name (eg, city) []:WAW
Organization Name (eg, company) [Internet Widgits Pty Ltd]:CeDeROM
Organizational Unit Name (eg, section) []:R&D
Common Name (e.g. server FQDN or YOUR name) []:localhost
Email Address []:

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:
Enter pass phrase for server.key:
Certificate request self-signature ok
subject=C = PL, ST = WAW, L = WAW, O = CeDeROM, OU = R&D, CN = localhost

2. Start local Jekyll with ssl:

% bundle exec jekyll serve --ssl-cert server.crt --ssl-key server.key
(..)
Enter PEM pass phrase:
    Server address: https://127.0.0.1:4000
  Server running... press ctrl-c to stop.

[acassis]

@cederom please explain "Why?" in the summary. That is the goal here? ("and why?")

[cederom]

@acassis done :-) Should I also update the git commit message? :-)