The “Rent 20th Anniversary Tour” is an energetic embrace of Jonathan Larson’s beloved masterpiece, from rebellious undercurrent to touching finale, with an eager, diverse cast fulfilling the challenge. Not only does the epic rock musical hold up, it’s also still surprisingly relevant. The answering machine and public pay phones may have been eclipsed, but talk of urban gentrification, addiction, gays, lesbians and police brutality is still very much with us.