With the new year, change has come to the Thrift Savings Plan’s lifestyle funds, or L funds. One fund, L 2010, has been retired. Another, L 2050, is set to become available at the end of this month. The L funds are a set of five investment funds that are professionally designed with different asset allocations of TSP’s five underlying funds — the C, S, I, F and G funds. The allocations are automatically adjusted in relation to how soon an investor will retire. TSP recommends that you select the L Fund with a maturity date that most closely matches…