Add logic for priority inheritance with multiple worker threads.  How should this work?  Tentatively, the all get reprioritized together.  It would be best to just reprioritize the single thread doing the high priority work, but we don't know which that will be in advance

Decoupling work queue data structures.  This is part of the preparation to support multiple low-priority worker threads

Passing va_list in syscall does not work.  Temporarily moved syslog and lowsyslog into kernel code and access via a system call.  Need to revisit.  Will probably need to move all of syslog back from fs/syslog to libc/syslog