Move SSH config to include-based.

dotfiles/ssh/config

@@ -1,9 +1,14 @@
-# Universal Settings (can't override)
-# Never fall back to protocol 1: it's broken
+# Universal Settings
 Protocol 2
 
+Include ~/.ssh/config.d/*
+
 # Defaults (May be Overridden)
+Host *.*
+  CheckHostIP         yes
+
 Host *
+  CheckHostIP         no
   ControlMaster       auto
   ControlPath         ~/.ssh/master/%r@%h:%p
   ControlPersist      yes
@@ -11,12 +16,6 @@ Host *
   ForwardX11          no
   ForwardX11Trusted   no
   ServerAliveInterval 120
-	CheckHostIP no
-
-Host warzone
-  Hostname warzone.shadowcats.club
-  Port 22
-  User matir
-
-Host github.com
-  Hostname ssh.github.com
+  UpdateHostKeys      yes
+  User                david
+  VerifyHostKeyDNS    yes