support vlan ids larger than 16-bit

[tsnoam]

VXLAN allows VNID of 24-bit. VNID is practically like a vlan tag and as such they should be treated the same.

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 98.18%. Comparing base (bd69795) to head (28ae4b7).

❗ Current head 28ae4b7 differs from pull request most recent head 59a4278. Consider uploading reports for the commit 59a4278 to get more accurate results

Files	Patch %	Lines
src/parser.rs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #4   +/-   ##
=======================================
  Coverage   98.18%   98.18%           
=======================================
  Files           8        8           
  Lines        3149     3149           
  Branches     3149     3149           
=======================================
  Hits         3092     3092           
  Misses         20       20           
  Partials       37       37           

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