feat(web/panettone): The start of a very simple issue tracker

Initial commit for Panettone, a very simple issue tracker for TVL. In
its current state this launches a web server with authenticates with our
ldap server, and supports listing and creating issues via static html
pages and simple forms.

We've been needing an issue tracker for a while now, but none of the
options out there seem very good - or there are some good ones, but
they're AGPL licensed and we don't want to deal with them. Rather than
muck around with Trac or Bugzilla, we've decided to write our own.

Change-Id: I704f0996d15199329bbd5450f3d959046bf13973
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1337
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>

lisp/klatre/klatre.lisp

@@ -73,7 +73,7 @@ separated by SEP."
 ;;; String handling
 ;;;
 
-(defconstant +dottime-format+
+(defparameter dottime-format
   '((:year 4) #\- (:month 2) #\- (:day 2)
     #\T
     (:hour 2) #\· (:min 2) "+00") ; TODO(grfn): Allow passing offset
@@ -83,7 +83,7 @@ separated by SEP."
   "Return TIMESTAMP formatted as dottime, using a +00 offset"
   (check-type timestamp local-time:timestamp)
   (local-time:format-timestring nil timestamp
-                                :format +dottime-format+
+                                :format dottime-format
                                 :timezone local-time:+utc-zone+))
 
 (comment