docs: Fix a few typos

[timgates42]

There are small typos in:

• backdoor/rubilyn/source/internals.h
• misc/README.md
• scanner/conscan/source/modules/cmsvulns.py
• wireless/hwk/source/src/rtap.c

Fixes:

• Should read vulnerabilities rather than vulnerabilites.
• Should read unique rather than uniqe.
• Should read preamble rather than preable.
• Should read miscellaneous rather than miscellanous.
• Should read extensions rather than exensions.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md