add set -e to env script

It avoids some long sequences of "echo: IO error" when the client
close the connection before EOF.

1 files changed, 2 insertions, 0 deletions

diff --git a/regress/env b/regress/env
index 1d82989..d44783f 100755
--- a/regress/env
+++ b/regress/env
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 printf "20 text/plain; lang=en\r\n"
 
 cat <<EOF