Synapse will not start without settings for `mail` and `name`, even though they are unused

[532910]

Whilst mail and name attributes are used only in the search mode, synapse will not start without them in the simple mode.

matrix-synapse-ldap3/ldap_auth_provider.py

Lines 369 to 373 in ddb3ec9

	_require_keys(config['attributes'], [
	"uid",
	"name",
	"mail",
	])