MEDIUM: config: Deprecate tune.ssl.capture-cipherlist-size

Deprecate tune.ssl.capture-cipherlist-size in favor of
tune.ssl.capture-buffer-size which better describes the purpose of the
setting.
diff --git a/.github/h2spec.config b/.github/h2spec.config
index a7b34ce..745a637 100644
--- a/.github/h2spec.config
+++ b/.github/h2spec.config
@@ -1,7 +1,7 @@
 global
     log stdout local0
     tune.ssl.default-dh-param 2048
-    tune.ssl.capture-cipherlist-size 1
+    tune.ssl.capture-buffer-size 1
 
 defaults
     mode http