WASHINGTON (Reuters) - U.S. market regulators charged Walt Disney Co. on Monday with failing to disclose a web of relationships between the entertainment giant and some of its directors and their family members. Amid continued turmoil in Disney's boardroom, the U.S. Securities and Exchange Commission said the Burbank, California-based company agreed to a cease-and-desist order pledging not to violate disclosure rules in the future. No monetary penalty was imposed in the case in which the SEC accused Disney of failing to tell investors that, between 1999 and 2001, it employed three adult children of directors. The children of directors Reveta...