Block destination IP by source IP

mean of "-" is "or".

switch -glob [IP::client_addr] {
	"1.2.3.4" -
	"10.12.*" { ... }
}

The above code works like the following code.

if { [IP::client_addr]  equals "1.2.3.4" or [IP::client_addr]  starts_with "10.12." } { ... }