[ietf-dkim] New Issue: Overview service-type and delegation

[Jim Fenton]

Section 4.1 paragraph 3 talks about the service type (s=) constraint in 
key records, and goes on to say that it is helpful when delegating 
signing authority.  s= was included to provide expansion capability 
should, at some point, some service other than email decide to use 
DKIM.  If and when some other service does use DKIM, the ability to 
constrain a key to signing email only would help delegation.  In the 
meanwhile, there isn't any benefit to delegation as a result of s=.

I suggest that the paragraph be deleted.

-Jim