degesch: implement -=/+= for multiple values

It didn't make sense to have these unimplemented,
though perhaps += shouldn't enforce a set.

Sadly, autocomplete is fairly difficult for -= of multiple items.

1 files changed, 2 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 04979e7..2a8a9a1 100644
--- a/NEWS
+++ b/NEWS
@@ -11,6 +11,8 @@
 
  * degesch: /deop and /devoice without arguments will use the client's user
 
+ * degesch: /set +=/-= now treats its argument as a string array
+
  * censor.lua: now stripping colours from censored messages;
    their attributes are also configurable rather than always black on black