Update config.xml

Did rephrasing things a bit.

src/config.xml

@@ -981,17 +981,20 @@ Go to the <a href="commands.html">next</a> section or return to the
     <option type='bool' id='CASE_SENSE_NAMES' defval='0' altdefval='Portable::fileSystemIsCaseSensitive()'>
       <docs>
 <![CDATA[
- With \c CASE_SENSE_NAMES doxygen will be better able to match the
- capabilities of the underlying file system.
- In case the files system supports files whose name only differs in the
- case used, the option must be set to \c YES to properly deal with such input files
- if they appear in the input, whereas for file systems that are not case
- sensitive the option should be be set to \c NO to properly deal with output files
- for symbols that only differ in case, like two classes one named \c CLASS
- and the other named \c Class and to support references to files without
- having to specify the correct case.
+ With the correct setting of option \c CASE_SENSE_NAMES doxygen will better be able to match the
+ capabilities of the underlying filesystem. 
 
- On Windows (including Cygwin) and Mac users are advised to set this option to \c NO.
+ In case the filesystem is case sensitive (i.e. it supports files in the same directory 
+ whose names only differ in casing), the option must be set to \c YES to properly deal with such files
+ in case they appear in the input. 
+ 
+ For filesystems that are not case sensitive the option should be be set to \c NO to properly 
+ deal with output files written for symbols that only differ in casing, such as for two classes, 
+ one named \c CLASS and the other named \c Class, and to also support references to files without
+ having to specify the exact matching casing.
+
+ On Windows (including Cygwin) and MacOS, users should typically set this option to \c NO,
+ whereas on Linux or other Unix flavors it should typically set to \c YES.
 ]]>
       </docs>
     </option>