Improve documentation in setup.sh.

diff --git a/setup.sh b/setup.sh
index 0f6cd1f458115955b5cfc9f3021449b97ee54987..98c910064a03178666d3762a1cc336c9637e5a1f 100755 (executable)
--- a/setup.sh
+++ b/setup.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
-# Runs setup.sh in all configuration directories.
+# Runs setup.sh in all configuration directories. Must be run in the main
+# configuration directory.
 
 
 # Projects which use git.