Release 7.0.4

This is a bug fix release to version 7.0.3.  We recommend that
everyone upgrade to this version.

As usual, the source code has been uploaded to the Bacula project of Source Forge.

         http://sourceforge.net/projects/bacula

The main fixes are to make copy/migration to a second SD work, and
to cleanup some of the inconsistencies in the cancel command which
could confuse the user.

02Jun14
– Better error handling for cancel command
– Fix compiler warning + simplify some #ifdefs
– Fix copy/migration to second SD
– Fix calls to sl.set_string()
– Improve sellist code