add last_bill field to manpage

diff --git a/FS/FS/cust_pkg.pm b/FS/FS/cust_pkg.pm
index 9ab2695..9f20603 100644 (file)
--- a/FS/FS/cust_pkg.pm
+++ b/FS/FS/cust_pkg.pm
@@ -100,6 +100,8 @@ inherits from FS::Record.  The following fields are currently supported:
 
 =item bill - date (next bill date)
 
+=item last_bill - last bill date
+
 =item susp - date
 
 =item expire - date