config_drive:
  Catch an instance of anonymous drives.  Doubtless many remain.

complete_rqe:
  Call logrq to log iodone events if DEBUG_LASTREQS is set.

  Call set_sd_state with setstate_noupdate to avoid buffered I/O out
  of interrupt context.

  Use define DEBUG_RESID instead of constant.

Remove dead expandrq() function

Malloc:
  Remove directory component of file names in malloc table.

Add function vinum_rqinfo (part of the request tracing stuff).

Add function logrq (part of the request tracing stuff).

vinumstrategy:
  Check whether config needs to be written to disk, do it if so.
  This is a stopgap until the Vinum daemon (bacchusd?  oenologistd?)
  is written.

  If DEBUG_LASTREQS is set, call logrq to log user buffer headers.

launch_requests:
  Correct format of debug output to console.

  If DEBUG_LASTREQS is set, call logrq to log request elements.

Add definitions for request trace.

set_sd_state:
  Check flags for setstate_noupdate.  If set, don't write the config
  to disk, just set global VF_DIRTYCONFIG flag.  This is part of the
  kludge to avoid writing config from an interrupt context.

Add declaration for vinum_rqinfo, put inside #ifdef DEBUG
Remove dead macro expandrq

Increase maximum ioctl reply length to 4 kB if DEBUG is set.
Define VINUM_RQINFO ioctl if DEBUG is set.

vinumioctl:
  Change implementation of VINUM_DEBUG ioctl: use a debug flag
  (DEBUG_REMOTEGDB) to decide whether to go into remote debugging or
  not.

  Implement VINUM_RQINFO.

Define kw_info even when not debugging.

Define VF_DIRTYCONFIG
Add pointers to request info to vinum_info if DEBUG is set.
Define setstate_noupdate
Define additional debug bits DEBUG_RESID, DEBUG_LASTREQS and
DEBUG_REMOTEGDB.