alternate attributeSourceIDs for a given nameid format

[Peter Schober]

* Baron Fujimoto <baron at hawaii.edu> [2021-03-12 05:04]:
>             <property name="activationCondition">
>                 <bean parent="shibboleth.Conditions.RelyingPartyId"
> c:candidate="SP_entityID_aberrant&target=aberrant" />
>             </property>
[...]
> The reference to entity "target" must end with the ';' delimiter.

The code seems to treat &foo is a pathological form of &foo; which is
an XML (or SAML, really) entity reference. To avoid that encode the
ampersand as an entity reference & (to get a literal '&' in an XML
document).

-peter