How do I play a D7 jazz chord on guitar?

It is fairly common for Russian guitar players (particularly those accompanying themselves singing, such as bards) to bring the tuning up or down several steps as desired, either to accommodate the voice or for varying string tension. Vladimir Vysotsky often tuned down a whole step, sometimes even a step and a half to an open E. Also, variations in the open G tuning were fairly common, i.e. Bulat Okudzhava would use the tuning of D'-G'-C-D-g-b-d' to play songs written in C, while bard Sergei Nikitin tuned his guitar to a minor open G: D'-G'-C-D-g-b flat-d'