Update `texinfo' documentation backend inside `help' functionality:
    
        help.sh
    
            - Start using MANUAL_CHANGED_DIRS variable to control what
              directories are changed after a documentation action.
              Generally all documentation actions take place inside
              MANUAL_BASEDIR_L10N, except when we rename an entire manual. 
          
              When an entire manual is rename, there is a MANUAL_BASEDIR
              source location and one MANUAL_BASEDIR target location.  The
              MANUAL_BASEDIR source location is marked for deletion and
              the MANUAL_BASEDIR target location is marked for addition. 
          
              This way, when we rename an entire manual, the
              MANUAL_CHANGED_DIRS needs to be set to contain these two
              locations.
    
            - Put initial syncronization of changes back into non-option
              arguments interpretation loop. This is required in order to
              use MANUAL_CHANGED_DIRS as source location.
    
            - Don't use MANUAL_TLDIR as source location to realize final
              commit of changes. Use MANUAL_CHANGED_DIRS as source
              location instead.
    
        texinfo_deleteEntryManual.sh
    
            - Set MANUAL_CHANGED_DIRS to MANUAL_BASEDIR when
              MANUAL_BASEDIR_L10N is the last manual inside
              MANUAL_BASEDIR.
    
        texinfo_updateStructureSection.sh
    
            - Reorganize MANUAL_ENTRIES definition.
    
        texinfo_renameEntryManual.sh
    
            - Redefine absolute path to changed directories
              (MANUAL_CHANGED_DIRS). 
              
            - It is important that MANUAL_CHANGED_DIRS be redefined after
              `texinfo_deleteEntryManual' invocation. Otherwise,
              redefinition of MANUAL_CHANGED_DIRS inside
              `texinfo_deleteEntryManual' will be the one used which might
              be not the value we need.