feat: Add experimental http3 support

Only enabled in Docker builds for now, due to build config required. Not
sure if more work is needed for 0RTT.

src/api/Cargo.toml

@@ -28,6 +28,10 @@ gzip_compression = [
 	"conduwuit-service/gzip_compression",
 	"reqwest/gzip",
 ]
+http3 = [
+	"conduwuit-core/http3",
+	"conduwuit-service/http3",
+]
 io_uring = [
 	"conduwuit-service/io_uring",
 ]

src/core/Cargo.toml

@@ -24,6 +24,9 @@ conduwuit_mods = [
 gzip_compression = [
 	"reqwest/gzip",
 ]
+http3 = [
+	"reqwest/http3",
+]
 hardened_malloc = [
 	"dep:hardened_malloc-rs"
 ]

src/main/Cargo.toml

@@ -99,6 +99,11 @@ gzip_compression = [
 hardened_malloc = [
 	"conduwuit-core/hardened_malloc",
 ]
+http3 = [
+	"conduwuit-api/http3",
+	"conduwuit-core/http3",
+	"conduwuit-service/http3",
+]
 io_uring = [
 	"conduwuit-database/io_uring",
 ]

src/service/Cargo.toml

@@ -32,6 +32,9 @@ gzip_compression = [
 	"conduwuit-core/gzip_compression",
 	"reqwest/gzip",
 ]
+http3 = [
+	"conduwuit-core/http3",
+]
 io_uring = [
 	"conduwuit-database/io_uring",
 ]