documentation overhaul (#353)

* ident
* remove $Id$ tags from rcs software which has been retired
* make an effort to sync required mib docs with actual code
* sync even more docs with what code actually does
* some whitespace nits
* fixup example to use snmpv2 for all but the most ancient devices
* remove blurb to find more specific snmp::info classes for classes
  which alrdy are as specific as they can get (eg snmp::info::layer3::vmware
  doesn't need info on to find a specific module since there ain't none)
* rename all sub {vendor} strings to lowercase vendor, if cisco, juniper
  and arista can be lowercase, so can be all the rest.
* fix tests
* spread some use warnings around
* use $ instead of @
* remove defines that are included via parent classes
* use strict + warnings
* remove alrdy included modules
* add comma after last list item
* typos
* mibs are found in our mib repo, not on the cisco site
* documentation fixes

lib/SNMP/Info/DocsisHE.pm

@@ -1,6 +1,7 @@
 package SNMP::Info::DocsisHE;
 
 use strict;
+use warnings;
 use Exporter;
 
 use SNMP::Info;
@@ -14,7 +15,7 @@ $VERSION = '3.68';
 
 %MIBS = (
     'DOCS-IF3-MIB' => 'docsIf3Mib',
-    'DOCS-IF-MIB' => 'docsIfMib'
+    'DOCS-IF-MIB'  => 'docsIfMib',
 );
 
 %GLOBALS = ();
@@ -26,12 +27,12 @@ $VERSION = '3.68';
     'docs_if_cmts_cm_status_inet_address_type' => 'docsIfCmtsCmStatusInetAddressType',
     'docs_if_cmts_cm_status_inet_address'      => 'docsIfCmtsCmStatusInetAddress',
     'docs_cmts_cm_down_channel_if_index'       => 'docsIfCmtsCmStatusDownChannelIfIndex',
-    'docs_cmts_cm_up_channel_if_index'         => 'docsIfCmtsCmStatusUpChannelIfIndex'
+    'docs_cmts_cm_up_channel_if_index'         => 'docsIfCmtsCmStatusUpChannelIfIndex',
 );
 
 %MUNGE = ();
 
- 1;
+1;
 __END__
 
 =head1 NAME
@@ -74,7 +75,7 @@ CableLabs MIBs for DOCSIS 3
 
 =back
 
-=head1 GLOBAL METHODS
+=head1 GLOBALS
 
 None.
 
@@ -119,3 +120,5 @@ cable modem.
 (C<docsIfCmtsCmStatusUpChannelIfIndex>)
 
 =back
+
+=cut