Add support for an advanced reservation start time that remains constant
relative to the current time. This can be used to prevent the starting of
longer running jobs on select nodes for maintenance purpose. See the
reservation flag "TIME_FLOAT" for more information.
bug 1087

various dead variable sets,
one possible NULL variable use in strcmp,
one possible unitialized variable use

xrealloc does, the previous code was resulting in all sorts of bad memory
references/frees.  This should fix it.  I checked the rest of the code and
these were the only ones that made the mistake.

One uses the job_id while the other uses job_id_str.
Changes to comments only. No changes in logic

Conflicts:
	doc/html/faq.shtml

Describe how jobs could be lost on slurmctld crash
Backport MPI performance FAQ
Fix bad href tag

allocation code. The first would trigger an assertion when trying to
reserve a port one beyond the bitstring range, and the second would
prevent releasing the last port in the range. This patch fixes those
issues.

When "scontrol update job" is executed with a JobName=, allow
filtering by user with the option UserID=

error has happened.

This modifies the reservation test to not fail if node names are of
the form "rack[0-3]_blade[0-63]"

 Added ability for "scontrol update" to references jobs by JobName.
bug 725

Remove redundant non-zero checks on xfree (e.g. "if (x) xfree(x);")
Remove some duplicate code for switch unpack logic for different
  RPC versions.

Conflicts:
	src/plugins/switch/cray/switch_cray.c