Use either/or to present options

lib/support/nginx/gitlab

@@ -4,8 +4,8 @@
 # CHUNKED TRANSFER
 # It is a known issue that Git-over-HTTP requires chunked transfer encoding [0] which is not
 # supported by Nginx < 1.3.9 [1]. As a result, pushing a large object with Git (i.e. a single large file)
-# can lead to a 411 error. In theory you can get around this by tweaking this configuration file and
-# - installing an old version of Nginx with the chunkin module [2] compiled in;
+# can lead to a 411 error. In theory you can get around this by tweaking this configuration file and either
+# - installing an old version of Nginx with the chunkin module [2] compiled in, or
 # - using a newer version of Nginx.
 #
 # At the time of writing we do not know if either of these theoretical solutions works. As a workaround