SNMP Default Port Support

Add options to defaults for SNMP Client port
SNMP Default Port Support

Use configured SNMP port rather than hard coded.
SNMP Default Port Support

Fix Typo #1
SNMP Default Port Support

Add support for SNMP v3 as well as SNMP v1/v2c
Create INSTALL_LIGHTTPD.md

Documentation for using Lighttpd instead of Apache as the web server.
Test and running for over 2 weeks on my own server.
Delete INSTALL_LIGHTTPD.md

Undo for commit
Merge pull request #237 from bohdan-s/master

Support for Custom Default SMNP Port
Add documentation for Lighttpd as Web Server
Update INSTALL_LIGHTTPD.md

Fix spelling mistake
Merge pull request #238 from bohdan-s/lighttpd

Add documentation for Lighttpd as Web Server