MFC r294949,r294952,r294953,r294957,r294965,r294967,r294968,r295017,r295026,
r295027,r295029,r295030,r295649: r294949: filemon_ioctl: Handle error from devfs_get_cdevpriv(9). r294952: filemon_ioctl: Lock the associated filemon handle before writing to it. r294953: filemon_comment has nothing to do with wrappers so move it out of filemon_wrapper.c. r294957: filemon_dtr: Lock the associated filemon handle before writing to it. r294965: filemon: Use process_exit EVENTHANDLER to capture process exit. r294967: filemon: Trace fork via process_fork event. r294968: Follow-up r294967: Mark flags unused. r295017: filemon: Use process_exec EVENTHANDLER to capture sys_execve. r295026: filemon_open: Don't record a process to trace here. r295027: filemon: Track the process pointer rather than a pid. r295029: Document the purpose and non-purpose of filemon(4). r295030: Note the double fork behavior with filemon. r295649: filemon: Fix panic when fork1() is called from kproc_create().