smurf: Remove spurious code introduced by previous commit

91000a56 accidentally introduced some code that trampled over the
previous addition of the "hitslimit" parameter (7e29ab2)
smurf: Allow COM flagging to be frozen after given number of iterations

See new config parameter com.freeze_flags. Setting it to 10 or so should
sometimes help out with convergence. Maybe we should set a non-zero
default for this after some further tests.