Validation regexps use ^$ instead of \A\z

[viktors]

In app/models/masq/account.rb these two validations allow newlines:

    validates_format_of :login, :with => /^[[email protected]]+$/
    validates_format_of :email, :with => /(^([^@\s]+)@((?:[-_a-z0-9]+\.)+[a-z]{2,})$)|(^$)/i

That allows e.g. registering with a username containing newline character.

More details: http://guides.rubyonrails.org/security.html#regular-expressions