DB_File 1.15 patch

DB_File 1.15 patch

This patch for DB_File fixes a few minor bugs and adds the sub-class patch.

    Patch from Gisle Aas <gisle@aas.no> to suppress "use of undefined
    value" warning with db_get and db_seq.

    Patch from Gisle Aas <gisle@aas.no> to make DB_File export only the
    O_* constants from Fcntl.

    Removed the DESTROY method from the DB_File::HASHINFO module.

    Previously DB_File hard-wired the class name of any object that it
    created to "DB_File". This makes sub-classing difficult. Now
    DB_File creats objects in the namespace of the package it has been
    inherited into.

p5p-msgid: 9707192117.AA01973@claudius.bfsec.bt.co.uk