Use protocol-relative link to door.sh, to avoid mixed content under SSL

diff --git a/index.mdwn b/index.mdwn
index 0e9313fe8f2a38cc2bee0780f16c4031ad5005f4..52b52794b3e5a754876d7bf255d78fe5cebd7824 100644 (file)
--- a/index.mdwn
+++ b/index.mdwn
@@ -1,6 +1,6 @@
 [[!meta title="MIT Student Information Processing Board"]]
 
-<img class="right" src="http://cesium.scripts.mit.edu/door/door.sh" />
+<img class="right" src="//cesium.scripts.mit.edu/door/door.sh" />
 
 We are MIT's volunteer student computing group, improving computing at
 MIT [[since 1969|history]].  Today, [[SIPB projects|projects]] provide innovative [[services|projects]] and