allow non-leading digits in NSID 'name' segment

atproto/syntax/nsid.go

···
 	"strings"
 )
 
-var nsidRegex = regexp.MustCompile(`^[a-zA-Z]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(\.[a-zA-Z]([a-zA-Z]{0,61}[a-zA-Z])?)$`)
+var nsidRegex = regexp.MustCompile(`^[a-zA-Z]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(\.[a-zA-Z0-9]([a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(\.[a-zA-Z]([a-zA-Z0-9]{0,62})?)$`)
 
 // String type which represents a syntaxtually valid Namespace Identifier (NSID), as would pass Lexicon syntax validation.
 //

atproto/syntax/testdata/aturi_syntax_valid.txt

···
 at://did:abc:123/io.nsid.someFunc/_
 at://did:abc:123/io.nsid.someFunc/~
 at://did:abc:123/io.nsid.someFunc/...
+at://did:plc:asdf123/com.atproto.feed.postV2

atproto/syntax/testdata/nsid_syntax_invalid.txt

···
 com.example.oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
 com.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.middle.foo
 
-# invliad examples
+# invalid examples
 com.example.foo.*
 com.example.foo.blah*
 com.example.foo.*blah
-com.example.f00
 com.exa💩ple.thing
 a-0.b-1.c-3
 a-0.b-1.c-o
-a0.b1.c3
 1.0.0.127.record
 0two.example.foo
 example.com
···
 com.atproto.feed.po#t
 com.atproto.feed.p!ot
 com.example-.foo
-
+com.example.fooBar.2

atproto/syntax/testdata/nsid_syntax_valid.txt

···
 
 # valid examples
 com.example.fooBar
+com.example.fooBarV2
 net.users.bob.ping
 a.b.c
 m.xn--masekowski-d0b.pl
···
 a01.thing.record
 a.0.c
 xn--fiqs8s.xn--fiqa61au8b7zsevnm8ak20mc4a87e.record.two
+a0.b1.c3
+com.example.f00
 
 # allows onion (Tor) NSIDs
 onion.expyuzz4wqqyqhjn.spec.getThing