add sha1sum and sha256sum columns

Signed-off-by: NMark Hymers <mhy@debian.org>

setup/init_pool.sql

@@ -70,6 +70,8 @@ CREATE TABLE files (
        md5sum TEXT NOT NULL,
        location INT4 NOT NULL, -- REFERENCES location
        last_used TIMESTAMP,
+       sha1sum TEXT NOT NULL,
+       sha256sum TEXT NOT NULL,
        unique (filename, location)
 );