www/libmicrohttpd: Update to 1.0.4

Backport upstream commits 4f049186bfe22ba12c07279f2eef99293798a710 and
a083613d8405fa3ad7f6bc5bbbb635d0f50799e0

References:
https://git.gnunet.org/gnunet/libmicrohttpd/commit/4f049186bfe22ba12c07279f2eef99293798a710.html
https://git.gnunet.org/gnunet/libmicrohttpd/commit/a083613d8405fa3ad7f6bc5bbbb635d0f50799e0.html

Changelog: https://github.com/Karlson2k/libmicrohttpd/blob/d30316fda936111ad5d4f8b1fde7747c289468b6/ChangeLog

PR: 294534
Reviewed by: Hung-Yi Chen <gaod@hychen.org> (maintainer)