The PSM doesn't work with IPv6 addresses if the ${ipaddr} placeholder is used on host or virtual-host

In order to use an IPv6 address on a URL or the HTTP Host header, the IP address must be enclosed within brackets in order to be valid.

In other words,

http://[2001:470:e2f1::d076:7aa8:3b6d:b630]:8980/opennms

http://2001:470:e2f1::d076:7aa8:3b6d:b630:8980/opennms

Host: [2001:470:e2f1::d076:7aa8:3b6d:b630]:8980

Host: 2001:470:e2f1::d076:7aa8:3b6d:b630:8980

The PSM is not checking if the IPv6 address has brackets when processing the placeholder which prevents the operation of the monitor.

The solution is to add the brackets at run-time if required in order to use the same PSM definition for both IPv4 and IPv6 addresses.