Add Webconfig applied subdocs in curl header to avoid URL truncation

[sadhyama]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 92.64706% with 10 lines in your changes missing coverage. Please review.

Project coverage is 80.64%. Comparing base (2c91a00) to head (71e19ad).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/webcfg_multipart.c	60.00%	4 Missing and 2 partials ⚠️
tests/test_multipart_unittest.c	96.63%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #248   +/-   ##
=======================================
  Coverage   80.64%   80.64%           
=======================================
  Files          38       38           
  Lines       11281    11281           
  Branches     1112     1112           
=======================================
  Hits         9097     9097           
  Misses       1170     1170           
  Partials     1014     1014           

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