refactor(users/glittershark): Rename to grfn

Rename my //users directory and all places that refer to glittershark to
grfn, including nix references and documentation.

This may require some extra attention inside of gerrit's database after
it lands to allow me to actually push things.

Change-Id: I4728b7ec2c60024392c1c1fa6e0d4a59b3e266fa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2933
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: glittershark <grfn@gws.fyi>

users/grfn/owothia/regex-tdfa-text.patch

@@ -0,0 +1,40 @@
+diff --git a/Text/Regex/TDFA/Text.hs b/Text/Regex/TDFA/Text.hs
+index c4ef9db..9299272 100644
+--- a/Text/Regex/TDFA/Text.hs
++++ b/Text/Regex/TDFA/Text.hs
+@@ -38,13 +38,6 @@ import Text.Regex.TDFA.NewDFA.Uncons(Uncons(uncons))
+ import qualified Text.Regex.TDFA.NewDFA.Engine as Engine(execMatch)
+ import qualified Text.Regex.TDFA.NewDFA.Tester as Tester(matchTest)
+ 
+-instance Extract T.Text where
+-  before = T.take; after = T.drop; empty = T.empty
+-
+-instance Uncons T.Text where
+-  {- INLINE uncons #-}
+-  uncons = T.uncons
+-
+ instance RegexContext Regex T.Text T.Text where
+   match = polymatch
+   matchM = polymatchM
+diff --git a/Text/Regex/TDFA/Text/Lazy.hs b/Text/Regex/TDFA/Text/Lazy.hs
+index 73ca4a0..52958fb 100644
+--- a/Text/Regex/TDFA/Text/Lazy.hs
++++ b/Text/Regex/TDFA/Text/Lazy.hs
+@@ -38,17 +38,10 @@ import Text.Regex.TDFA.NewDFA.Uncons(Uncons(uncons))
+ import qualified Text.Regex.TDFA.NewDFA.Engine as Engine(execMatch)
+ import qualified Text.Regex.TDFA.NewDFA.Tester as Tester(matchTest)
+ 
+-instance Extract L.Text where
+-  before = L.take . toEnum; after = L.drop . toEnum; empty = L.empty
+-
+ instance RegexContext Regex L.Text L.Text where
+   match = polymatch
+   matchM = polymatchM
+ 
+-instance Uncons L.Text where
+-  {- INLINE uncons #-}
+-  uncons = L.uncons
+-
+ instance RegexMaker Regex CompOption ExecOption L.Text where
+   makeRegexOptsM c e source = makeRegexOptsM c e (L.unpack source)
+