Try this (removed the last comma before the closing parentheses):

url.redirect = (        "^/fotogalerias/(.*)\.jpg$" => "http://cdn.server.com/fotogalerias/$1.jpg",
                        "^/fotogalerias/(.*)\.JPEG$" => "http://cdn.server.com/fotogalerias/$1.JPEG",
                        "^/fotogalerias/(.*)\.GIF$" => "http://cdn.server.com/fotogalerias/$1.GIF",
                        "^/fotogalerias/(.*)\.gif$" => "http://cdn.server.com/fotogalerias/$1.gif",
                        "^/fotogalerias/(.*)\.pcx$" => "http://cdn.server.com/fotogalerias/$1.pcx",
                        "^/fotogalerias/(.*)\.PCX$" => "http://cdn.server.com/fotogalerias/$1.PCX" 
)