saml2: Generate stable persistent NameID values.
saml2: Generate stable persistent NameID values.

Patch by jon.prettyman <http://code.google.com/u/jon.prettyman/>.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@2238 44740490-163a-0410-bde0-09ae8108e29a

StudentLifeMarketingAndDesign/simplesamlphp,sitya/simplesamlphp,girgen/simplesamlphp,cwaldbieser/simplesamlphp,madmatt/simplesamlphp,shoaibali/simplesamlphp,sylvainmed/simplesamlphp,jschlyter/simplesamlphp,madmatt/simplesamlphp,simplesamlphp/simplesamlphp,grnet/simplesamlphp,girgen/simplesamlphp,gtkrug/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,shoaibali/simplesamlphp,BrettMerrick/simplesamlphp,grnet/simplesamlphp,dialogik/simplesamlphp,dzuelke/simplesamlphp,Kunstmaan/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,dialogik/simplesamlphp,dzuelke/simplesamlphp,sylvainmed/simplesamlphp,dialogik/simplesamlphp,ghalse/simplesamlphp,BrettMerrick/simplesamlphp,dialogik/simplesamlphp,gtkrug/simplesamlphp,gtkrug/simplesamlphp,BrettMerrick/simplesamlphp,sitya/simplesamlphp,sitya/simplesamlphp,dzuelke/simplesamlphp,simplesamlphp/simplesamlphp,madmatt/simplesamlphp,maytechnet/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,dnmvisser/simplesamlphp,Kunstmaan/simplesamlphp,cwaldbieser/simplesamlphp,sylvainmed/simplesamlphp,cwaldbieser/simplesamlphp,sitya/simplesamlphp,simplesamlphp/simplesamlphp,maytechnet/simplesamlphp,dnmvisser/simplesamlphp,dialogik/simplesamlphp,grnet/simplesamlphp,maytechnet/simplesamlphp,girgen/simplesamlphp,maytechnet/simplesamlphp,jschlyter/simplesamlphp,Kunstmaan/simplesamlphp,jschlyter/simplesamlphp,gtkrug/simplesamlphp,BrettMerrick/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,sylvainmed/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,shoaibali/simplesamlphp,grnet/simplesamlphp,cwaldbieser/simplesamlphp,girgen/simplesamlphp,simplesamlphp/simplesamlphp,jschlyter/simplesamlphp,dnmvisser/simplesamlphp,Kunstmaan/simplesamlphp,shoaibali/simplesamlphp,madmatt/simplesamlphp,jschlyter/simplesamlphp,girgen/simplesamlphp,dzuelke/simplesamlphp