How to tell Maven to disregard SSL errors (and trusting all certs)?

Answer at StackOverflow and copied here if it gets removed:
You can disable SSL certificate checking by adding one or more of these command line parameters:

-Dmaven.wagon.http.ssl.insecure=true - enable use of relaxed SSL check for user generated certificates.
-Dmaven.wagon.http.ssl.allowall=true - enable match of the server's X.509 certificate with hostname. If disabled, a browser like check will be used.
-Dmaven.wagon.http.ssl.ignore.validity.dates=true - ignore issues with certificate dates.

Official documentation: http://maven.apache.org/wagon/wagon-providers/wagon-http/

Here's the oneliner for an easy copy-and-paste:
-Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true -Dmaven.wagon.http.ssl.ignore.validity.dates=true