metaedit: Fix cross-site scripting.
metaedit: Fix cross-site scripting.

metaedit fails to validate the userid. If a malicious user is able to
make another user log in as that user id, he will be able to run scripts
in the domain of the site.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@2442 44740490-163a-0410-bde0-09ae8108e29a

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