keywords changed

• keywordshas-patch added; needs-refresh removed

15706.3.patch is a refresh against trunk that does the following (some overlap with #21730):

• Introduces is_email_domain_in_list(), a utility function for checking whether an email passes a domain whitelist/blacklist check. It supports wildcard URL chunks using *.
• Refactors is_email_address_unsafe() to use is_email_domain_in_list()
• Introduces is_email_address_allowed() to parallel is_email_address_unsafe()

15706.3.unit-tests.patch provides unit tests for the new wildcard functionality. Everything passes.