Describe delete_incomplete

Signed-off-by: Nico Schottelius <nico@denkbrett.schottelius.org>

doc/ccollect.text

@@ -140,7 +140,7 @@ For those who do not want to read the whole long document:
 --------------------------------------------------------------------------------
 # get latest ccollect tarball from http://unix.schottelius.org/ccollect/
 # replace value for CCV with the current version
-export CCV=0.7.0
+export CCV=0.7.1
 
 #
 # replace 'wget' with 'fetch' on bsd
@@ -254,7 +254,7 @@ Runtime options
 `ccollect` looks for its configuration in '/etc/ccollect' or, if set, in
 the directory specified by the variable '$CCOLLECT_CONF':
 --------------------------------------------------------------------------------
-# sh-compatible (zsh, mksh, ksh, bash, ...)
+# sh-compatible (dash, zsh, mksh, ksh, bash, ...)
 $ CCOLLECT_CONF=/your/config/dir ccollect.sh ...
 
 # csh
@@ -325,6 +325,13 @@ human readable format before and after the whole backup process:
 -------------------------------------------------------------------------
 
 
+General delete_incomplete
+^^^^^^^^^^^^^^^^^^^^^^^^^
+If you add '$CCOLLECT_CONF/defaults/`delete_incomplete`', this
+option applies for all sources. See below for a longer
+explanation.
+
+
 Source configuration
 ~~~~~~~~~~~~~~~~~~~~
 Each source configuration exists in '$CCOLLECT_CONF/sources/$name' or

doc/todo/0.8.0

@@ -3,3 +3,4 @@
    check_option $f_name
       => source
       => defaults
+- support all senseful options as default and source specific