gdbm: add <gdbm> constructor
gdbm: add <gdbm> constructor

erg/factor,mcandre/factor,erg/factor,kingcons/factor,mcandre/factor,mcandre/factor,kingcons/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor,mcandre/factor,kingcons/factor,erg/factor,kingcons/factor,erg/factor,erg/factor,erg/factor