Codename (n=) e.g. etch, lenny, squeeze, sid
Label (l=)
Component (c=)
+ Binary Architecture (b=)
If there are no equals signs in the string then it is scanned in short
form - if it starts with a number it is Version otherwise it is an
Archive or a Codename.
string RelArchive;
string RelLabel;
string RelComponent;
+ string RelArchitecture;
bool MatchAll;
// Origin Matching