Bug#629184: file_pager_write_page: Assertion `block' failed

[Gabriele Giacone <1o5g4r8o@gmail.com>]

retitle 629184 fifo translators don't die
thanks

To reproduce, create and use 1024 names pipes. System will crash with failed
assertion in question or ipc_task_init panic.
e.g. You might reproduce it by rebuilding gnash package with --with-swfdec-testsuite
configure option. It'd create, use and remove many fifos but translators would remain
present until limit is reached.

Workaround (thanks braunr): rebuild gnumach increasing TASK_MAX. 2048 will
suffice to get a complete build. Bigger values won't hurt.