git grep -l ERP5Site_getAuthenticatedMemberPersonValue | xargs sed -i 's!\.ERP5Site_getAuthenticatedMemberPersonValue()!.getPortalObject().portal_membership.getAuthenticatedMember().getUserValue()!g'
Plus s/portal.getPortalObject()/portal/g where modified by above regex.
Plus manual edits of the few remaining matches.
Special mention for DiscussionThreadModule_addReply, which forgot to
actually call the script.