Jasig/person-directory — pull request #3 by prigaux (2013-03-18 13:58:24+00:00)
Title: PERSONDIR-61: handle multi-valued attributes from Shibboleth SP

dixit https://wiki.shibboleth.net/confluence/display/SHIB2/NativeSPAttributeAccess:

multiple attribute values are separated by a semicolon,
and semicolons in values are escaped with a backslash.