Also warn if there's a mostly impossible error

ccollect.sh

@@ -467,7 +467,8 @@ while [ "${i}" -lt "${no_sources}" ]; do
       _exit_err "Creating ${destination_dir} failed. Skipping."
 
    # absulte now, it's existing
-   abs_destination_dir="$(cd "${destination_dir}" && pwd -P)"
+   abs_destination_dir="$(cd "${destination_dir}" && pwd -P)" || \
+      _exit_err "Changing to newly created ${destination_dir} failed. Skipping."
 
    #
    # added marking in 0.6 (and remove it, if successful later)

doc/todo/0.6.1

@@ -5,6 +5,11 @@
 - do not delete_incomplete, when there's only one backup left!
 - .ccollect-marker is deleted by rsync at the beginning!
    - fix marking
+- add logwrapper
+- add loganalyser
+   speedup is
+   error codes
+   vanished files (see netstream)!!!
 
 Done:
 - Improve finding backup from another interval:
@@ -15,3 +20,4 @@ Done:
 
 not needed:
 - think about 'prefer_same_interval' / 'prefer_latest'
+