RFR: JDK-8231912: Use https for URLs in help and error messages

[Andy Herrick]

Please review the jpackage fix for bug [1] at [2].

This is a fix for the JDK-8200758-branch branch of the open sandbox 
repository (jpackage).

This change modifies an number of urls used, mostly just changing http 
to https.

[1] https://bugs.openjdk.java.net/browse/JDK-8231912

[2] https://cr.openjdk.java.net/~herrick/8231912/webrev.02/

/Andy