_tagRefs doesn't know that space and dash are equivalent

(Bug, To be Fixed , Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Tag Sets, Functions
Summary: Noticed in the Period Games Space. If, say, an External Link points to "Byzantine-Chess", the Byzantine Chess page's _tagRefs doesn't catch it. This is presumably because _tagRefs doesn't know to normalize spaces in link names.