[Bro] defining a table of sets

[Vern Paxson]

> smith.bro, line 150 (alpha, anchor, armor): bad tag in Val::CONVERTER
> (types/table)

This is definitely a bug.

A workaround is to use a temporary variable:

	global t1 = set( "alpha", "anchor", "armor" );
	global distinct_peers: table[string] of set[string] = {
		[ "a" ] = t1,	# this works
	};

- Vern