Fix regression when connecting via SSL to mucks with valid certificates.

[dinoex]

A couple of mucks i connect to uses TLS 1.2 or better.

After update from 5.1.6 to 5.2.1 i was unable to connect:

% Trying to connect to muck: 2600:3c03::XXXX:XXXX:XXXX:XXXX 23551.
% Intermediate connection to spr failed: SSL/lib: error:0A000438:SSL routines::tlsv1 alert 
    internal error
% Trying to connect to muck: 173.XXX.XXX.XXX 23551.
% Connection to dspr failed: SSL: SSL_ERROR_ZERO_RETURN

This patch reverts the default of "ssl_insecure" to FALSE.

[ingwarsw]

Why you cannot just set that flag before connection?

My bad.. default should be "secure", not "insecure"..

Could you also change default in help https://github.com/ingwarsw/tinyfugue/blob/main/lib/tf/tf-help#L9558

[ingwarsw]

@dinoex Thanks for PR..