Import upstream v0.16.22, stripped

Upstream commit: 474dd0229cb20cf513036619781ed97bd8073c3f
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 117 in 50 files
Dangling module declarations removed: 5
Cargo edits turning enterprise off: 14
Verification: clean
Enterprise feature gates left for rebuilt features: 19 in 18 files

Produced by tools/fork/strip.py. The full report is in docs/fork/strip-reports/ on main.

tests/resources/proxy-protocol/Docker.haproxy

@@ -0,0 +1,6 @@
+# docker build -t test-haproxy -f Docker.haproxy .
+# docker run -it --rm --name haproxy-syntax-check test-haproxy haproxy -c -f /usr/local/etc/haproxy/haproxy.cfg
+# docker run -d -p 1111:1111 --name some-haproxy --sysctl net.ipv4.ip_unprivileged_port_start=0 test-haproxy
+
+FROM haproxy:2.3
+COPY haproxy.cfg /usr/local/etc/haproxy/haproxy.cfg