TASK-HANDLER-BIND does not accept compound type specifiers

[Jan Moringen]

The documentation string of task-handler-bind claims that it works like handler-bind but it actually only accepts symbols as condition type specifiers:

(lparallel:task-handler-bind (((and error (not undefined-function)) #'continue)) …)
=> Ill-formed binding in `task-handler-bind': ((AND ERROR (NOT UNDEFINED-FUNCTION)) #'CONTINUE)