Make $wgEmailConfirmToEdit only affect edit actions.
Previously it would affect all actions that use Title::userCan.
This used to be less noticable, but recently was expanded to include
the 'read' action. This only affected the case where both
$wgBlockDisablesLogin and $wgEmailConfirmedToEdit were enabled.
I don't think anyone was relying on the old behaviour as it was
undocumented, and only affected obscure permissions (checked with
Title::userCan and not depending on "edit" rights)
Follow-up
b675be2083
Bug: T143790
Change-Id: I4ad93ed78de4f1ed444f73df6dc26d405a67e553