support querying _matrix-fed and _matrix

_matrix-fed is the new IANA registered SRV record service name
per MSC4040. _matrix is now considered deprecated in Matrix 1.8.
see 3.3 and 3.4 of https://spec.matrix.org/v1.8/server-server-api/#resolving-server-names



Signed-off-by: girlbossceo <june@girlboss.ceo>