Move fd-plugins.c and add fd-plugins.h

git-svn-id: https://bacula.svn.sourceforge.net/svnroot/bacula/trunk@6277 91ce42f0-d328-0410-95d8-f526ca767f89

diff --git a/bacula/src/dird/fd-plugins.c b/bacula/src/filed/fd-plugins.c
similarity index 100%
rename from bacula/src/dird/fd-plugins.c
rename to bacula/src/filed/fd-plugins.c