Add fingerprint for WHMCompleteSolution session cookie

[SnazzyNivesh522]

Description

I have added fingerprint in xml/http_cookies.xml to detect WHMCS login pages.

Motivation and Context

I have used to detect WHMCS and did not found a fingerprint for the same so contributed here.

How Has This Been Tested?

I have tested against a example URL using following command
curl --silent -I -k <example_url> | grep --color=never -i '^Set-Cookie:' | cut -d: -f2- | bin/recog_match xml/http_cookies.xml -
and output is
MATCH: {"matched"=>"WHMCompleteSolution (WHMCS) session cookie", "cookie"=>"WHMCS", "service.vendor"=>"WHMCS", "service.product"=>"WHMCompleteSolution", "service.cpe23"=>"cpe:2.3:a:whmcs:whmcompletesolution::::::::", "tags"=>"web,session,hosting-billing", "service.protocol"=>"http", "fingerprint_db"=>"http_header.cookie", "data"=>"WHMCSy551iLvnhYt7=fbadc7baf8acaac14c125682937f711a; path=/; secure; HttpOnly"}

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• I have updated the documentation accordingly (or changes are not required).
• I have added tests to cover my changes (or new tests are not required).
• All new and existing tests passed.