NHL: Frolov to the Rangers, and other signings LW Alexander Frolov signs with the New York Rangers (1 year, 4M) LW Alexei Ponikarovsky signs with the Los Angeles Kings (1 year, 3.2M) LW Matt Moulson re-sings with the New York Islanders (1 year, 2.45M) F Tomas Fleischmann re-signs with the Washington Capitals (1 year, 2.6M)…