Add listenaddress option

[alsm]

I've added an explicit listenaddress option in addition to listenport.
In my particular use case I'm running falcosidekick in a net=host
container and don't want it to bind to external IPs.
Also fixed a gosec complaint about json.Unmarshal in webui.go

Signed-off-by: Al Stockdill-Mander asm@uk.ibm.com

/kind cleanup
/kind feature

/area config

Special notes for your reviewer:

I've removed the "\n" from log lines around the areas I have changed as they are not required, from https://golang.org/pkg/log/ "Every log message is output on a separate line: if the message being printed does not end in a newline, the logger will add one."

Also when resolving the gosec issue with json.Unmarshal in webui.go I changed the fmt.Sprintf to .String() on the Get() as https://golang.org/pkg/expvar/#Var specifies that

type Var interface {
// String returns a valid JSON value for the variable.
// Types with String methods that do not return valid JSON
// (such as time.Time) must not be used as a Var.
String() string
}

[poiana]

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[poiana]

LGTM label has been added.

Git tree hash: 1088d39f80d44bffaacc7bfbcfc365ddd555ec02

[Issif]

🙏