Various FreeBSD improvements (#3219)

* Fix permission denied (/var/run/stalwart.pid) on FreeBSD install

* Remove jemalloc dependency on FreeBSD (which is already using jemalloc)

* Enabling binding to privileged ports on FreeBSD

crates/main/Cargo.toml

@@ -40,7 +40,7 @@ migration = { path = "../migration" }
 tokio = { version = "1.47", features = ["full"] }
 rustls = { version = "0.23.5", default-features = false, features = ["std", "aws_lc_rs", "tls12"] }
 
-[target.'cfg(not(target_env = "msvc"))'.dependencies]
+[target.'cfg(not(any(target_env = "msvc", target_os = "freebsd")))'.dependencies]
 jemallocator = "0.5.0"
 
 [features]

crates/main/src/main.rs

@@ -23,10 +23,10 @@ use utils::wait_for_shutdown;
 #[cfg(feature = "dev_mode")]
 pub mod test_data;
 
-#[cfg(not(target_env = "msvc"))]
+#[cfg(not(any(target_env = "msvc", target_os = "freebsd")))]
 use jemallocator::Jemalloc;
 
-#[cfg(not(target_env = "msvc"))]
+#[cfg(not(any(target_env = "msvc", target_os = "freebsd")))]
 #[global_allocator]
 static GLOBAL: Jemalloc = Jemalloc;