[interchange] Newer MySQL versions need ISO timestamp, just like Postgres does

[Jon Jensen]

commit dfa5006e80fae5ff354dfeb0671ddd14b1e88c31
Author: Jon Jensen <jon at endpoint.com>
Date:   Fri Apr 6 18:12:01 2018 -0600

    Newer MySQL versions need ISO timestamp, just like Postgres does
    
    Tested with Oracle's distribution of MySQL 5.7.

 dist/strap/dbconf/mysql/userdb.mysql |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/dist/strap/dbconf/mysql/userdb.mysql b/dist/strap/dbconf/mysql/userdb.mysql
index 03ce40d..15c195b 100644
--- a/dist/strap/dbconf/mysql/userdb.mysql
+++ b/dist/strap/dbconf/mysql/userdb.mysql
@@ -51,3 +51,5 @@ Database  userdb  COLUMN_DEF   "updated=varchar(32)"
 Database  userdb  COLUMN_DEF   "zip=varchar(10)"
 Database  userdb  PREFER_NULL   mod_time
 Database  userdb  INDEX        "UNIQUE usernick"
+
+UserDB    default    iso_time  1