HTTP server Formula was removed
Last version was
httpd24 requires the following formulae to be installed:
openssl 1.0.2n SSL/TLS cryptography library
pcre 8.42 Perl compatible regular expressions library
zlib 1.2.11 General-purpose lossless data-compression library
nghttp2 1.31.0 HTTP/2 C Library

Recent formula history

Mike McQuaid Migrate tap to homebrew/core.
ilovezfs httpd24 2.4.27
Kevin Abel httpd24 2.4.26
FX Coudert httpd24: import homebrew/dupes into core.
Kevin Abel httpd24 2.4.25

Formula code at GitHub