Build

DNS: fix relationship between FPC and subclassification (#2702) #5121

Job	Run time
Python Bindings (ubuntu-latest)	1m 8s
ubuntu-22.04 cc	4m 48s
ubuntu-24.04 cc	8m 21s
macOS-13 cc	6m 7s
macOS-14 cc	2m 38s
macOS-15 cc	2m 24s
ubuntu-22.04-arm cc	2m 23s
ubuntu-24.04-arm cc	2m 21s
ubuntu-22.04 gcc-4.9 --with-pcre2 --with-maxminddb --with-sanitizer	8m 41s
ubuntu-24.04 gcc-14 --with-pcre2 --with-maxminddb --with-sanitizer	12m 25s
ubuntu-22.04 clang-12 --with-pcre2 --with-maxminddb --with-sanitizer	13m 36s
ubuntu-24.04 clang-18 --with-pcre2 --with-maxminddb --with-sanitizer	16m 11s
ubuntu-latest cc --with-pcre2 --with-maxminddb nBPF	3m 32s
LTO and Gold Linker gcc-14	2m 52s
ubuntu-latest cc --with-pcre2 --with-maxminddb --disable-global-context-support	5m 43s
Test Utils (ubuntu-latest)	2m 55s
LTO and Gold Linker clang-18	2m 42s
macOS-latest cc --with-pcre2 --with-maxminddb	2m 38s
windows-latest (msys2)	7m 14s
	1h 48m 39s

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