get_ss3_exe() function failing for some users due to SSL error unrelated to r4ss

[iantaylor-NOAA]

Thanks to @MOshima-PIFSC for pointing out that an issue that only NOAA folks (as far as I know) have been having for a few weeks with R on Windows not being able to access URLs is impacting r4ss::get_ss3_exe(). The function errors with the message status was 'SSL connect error'.

The SS3 releases are still available for manual download at https://github.com/nmfs-ost/ss3-source-code/releases/, but the convenient R function won't work for some of us until the SSL error is fixed.

If anyone has an idea for a change to r4ss that works around this, feel free to chime in. Otherwise, I'll just leave this issue up for informational purposes until the problem is resolved outside of r4ss.