[interchange] Remove MySQL userdb.password NOT NULL constraint to match Postgres

[Jon Jensen]

commit 143681a341891a8bd58bf25fc472549a0be84525
Author: Jon Jensen <jon at endpoint.com>
Date:   Fri Apr 6 18:18:42 2018 -0600

    Remove MySQL userdb.password NOT NULL constraint to match Postgres

 dist/strap/dbconf/mysql/userdb.mysql |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/dist/strap/dbconf/mysql/userdb.mysql b/dist/strap/dbconf/mysql/userdb.mysql
index 15c195b..4c8f925 100644
--- a/dist/strap/dbconf/mysql/userdb.mysql
+++ b/dist/strap/dbconf/mysql/userdb.mysql
@@ -2,7 +2,7 @@ Database  userdb  userdb.txt   __SQLDSN__
 Database  userdb  DEFAULT_TYPE varchar(255)
 Database  userdb  COLUMN_DEF   "username=varchar(191) NOT NULL PRIMARY KEY"
 Database  userdb  COLUMN_DEF   "usernick=varchar(191)"
-Database  userdb  COLUMN_DEF   "password=varchar(64) NOT NULL"
+Database  userdb  COLUMN_DEF   "password=varchar(64)"
 Database  userdb  COLUMN_DEF   "expiration=varchar(32)"
 Database  userdb  COLUMN_DEF   "accounts=BLOB"
 Database  userdb  COLUMN_DEF   "acl=text"