correct code indention, remove whitespaces at EOL, add documentation about vCenter usage

plugins/vmware/esx_

@@ -45,6 +45,19 @@ Then you need to add this host to your munin.conf on the munin server
 munin-node, and wait for the data to populate.
 
 
+       -== Query all hosts of a vCenter ==-
+An alternate way of using this plugin is to link it to
+/etc/munin/plugins/vcenter_<hostname_of_vcenter>
+In this mode, the vCenter server specified in the filename is queried
+for a list of hosts it manages, and graphs are created for all these
+hosts. The option "flatview" is implied in this mode, since one munin
+plugin can only be assigned to one host. The option "vCenter" is ignored
+since the vCenter server is given through the file name. You can, however
+still use the option "flatview" to override the "host_name" under which
+the results are reported. Make sure to read the section below about
+this option!
+
+
        -== Graphs don't render ==-
 Munin 1.4 has a bug with complex multigraphs like this, see
 http://munin-monitoring.org/ticket/1224 for details and a fix if
@@ -163,7 +176,7 @@ foreach $host_name (@host_names) {
     local *FH;
     my $pid = open(FH, "-|");
     if ($pid == 0) {
-######################## CHILD
+        # CHILD
 
         if ((defined $ARGV[0]) and ($ARGV[0] eq "config")) {
             if ($ENV{flatview}) {
@@ -468,11 +481,12 @@ print "# time of the script: ", time() - $sstarttime, "\n" if $DEBUG;
 
         exit 0;
     } else {
-################################ PARENT
+        # PARENT
         push @returns, *FH;
     }
 }
 
+# gather and print the output of the forked processes
 foreach my $fh (@returns) {
     while (<$fh>) {
         print $_;