add preferred jemalloc config

add muzzy/dirty configuration mallctl interface

add program argument for --gc-muzzy=false

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/alloc/default.rs

@@ -1,7 +1,7 @@
 //! Default allocator with no special features
 
 /// Always returns Ok
-pub fn trim() -> crate::Result { Ok(()) }
+pub fn trim<I: Into<Option<usize>>>(_: I) -> crate::Result { Ok(()) }
 
 /// Always returns None
 #[must_use]