consensus-formats: formatting of router items up to and excluding `s`

s is done in !324 (merged), so stopping this branch here.

spec/dir-spec/consensus-formats.md

@@ -593,8 +593,8 @@ and the authority believes that
 the first advertised address is reachable.
 Any other IPv4 or IPv6 addresses should be ignored.
 
-Address and port are as for "or-address"
-as specified in section 2.1.1.
+Address and port are as for
+[`or-address`](server-descriptor-format.html#item:or-address).
 
 (Only included when the vote or consensus is generated with
 consensus-method 14 or later.)