Added module to enumerate certain Sercomm devices through backdoor
See more: https://github.com/elvanderb/TCP-32764
Cleanup
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Changed datastore['rhost'] to rhost
Made the array storing configuration values into a class const
Moved superfluous array look-over to not be executed unless in verbose
mode
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Refactored the configuration settings so that creds could be reported to
the database more easily, while still being able to print general
configuration settings separately.
Moved auxiliary module to a more appropriate folder
Clean sercomm_dump_config
Made fixes from the PR from jvazquez-r7

The get_once would *only* return "MMcS", and stop. I
modified it to be a get(3, 3). Additionally, the command
length was set to 0x01 when it needed to be 0x00.
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Removed the parameters from get() since it works without them
Fix indentation
Land #2822, @mandreko's aux module for OSVDB 101653
Delete parentheses