rephrase and cleanup cdist-explorers.text

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

doc/man/cdist-explorers.text

@@ -7,37 +7,37 @@ NAME
 ----
 cdist-explorer - Explore the target systems
 
+
 DESCRIPTION
 -----------
 Cdist explorer are small shell scripts, which will be executed
 on the target host. The aim of the explorer is to give hints
 to types on how to act on the target system.
+The explorer output the result of its investigation
+to stdout and should be a one-liner. The output may be empty,
+though.
 
-Explorer are located below $config_dir/explorer. Their name
-must be usable as a environment variable.
+Cdist knows about general explorers, which are run in an early
+stage and type specific explorers. Both work exactly the same way,
+with the difference that the values of the general explorers
+are stored in a general location and the type specific below
+the types.
 
-The shell script must output the result of its investigation
-to stdout. The output may be empty.
+Explorers can reuse other explorers on the target system
+by calling ./<explorer_name> (i.e. explorers are run
+from their location).
 
 In case of significant errors, the shell script may exit
 non-zero and return an error message on stderr, which
 will cause the cdist run to abort.
 
-Explorers can reuse other explorers on the target system
-by calling $__cdist_explorer_path/<explorer_name>.
-
-REQUIREMENTS
-------------
-The directory $__cdist_remote_base_dir must be creatable
-on the target host (i.e. requires read/write permission).
 
 SEE ALSO
 --------
-cdist(7)
+cdist(7), cdist-config-layout(7), cdist-stages(7)
 
 
 COPYING
 -------
 Copyright \(C) 2010-2011 Nico Schottelius. Free use of this software is
 granted under the terms of the GNU General Public License version 3 (GPLv3).
-