MaskAndUserTagArguments is a convenient way of calling both UserTagArguments and MaskArguments on the given data.

MaskArguments returns a new slice with the values of the flags given in flagsToMask replaced by a fix number of *.

UserData returns an Attr for a string value that should be treated as user data.

UserTagArguments returns a new slice with the values for the flags given in flagsToTag surrounded by the <ud></ud> tags.

UserDataValue is a string that should be treated as user data, and therefore tagged as such in the logs.