mda: rename PI_FAILBOX to PI_EMERGENCY

The emergency destination may be Maildir.  A Maildir emergency
destination is better for volatile data which is written to
and deleted-from frequently.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/cgi.t b/t/cgi.t
index 3cf230c0..b992af31 100644
--- a/t/cgi.t
+++ b/t/cgi.t
@@ -40,7 +40,7 @@ my $cfgpfx = "publicinbox.test";
 }
 
 my $failbox = "$home/fail.mbox";
-local $ENV{PI_FAILBOX} = $failbox;
+local $ENV{PI_EMERGENCY} = $failbox;
 {
         local $ENV{HOME} = $home;
         local $ENV{RECIPIENT} = $addr;