p: report all directory symlinks and targets encountered while canonicalizing

Signed-off-by: Andreas Beckmann <anbe@debian.org>
p-s: handle Ctrl-C while downloading Packages files

flush/unreserve as if interrupted during testing

Signed-off-by: Andreas Beckmann <anbe@debian.org>
p-s: catch MasterNotOK exception while talking to the master

Signed-off-by: Andreas Beckmann <anbe@debian.org>
p.conf.anbe: [jessie-nodocs] --scriptsdir scripts-no-usr-share-doc

Signed-off-by: Andreas Beckmann <anbe@debian.org>