example-plugin: Fix server dependency path

Author: saulvaldelvira

crates/server/example-plugin/Cargo.toml

@@ -10,4 +10,4 @@ name = "init_handler"
 crate-type = [ "cdylib" ]
 
 [dependencies]
-server = { package = "http-srv", path = "../crates/server" }
+server = { package = "http-srv", path = "../" }

crates/server/example-plugin/src/lib.rs

@@ -4,7 +4,7 @@ use http::HttpRequest;
 use server::{handler::Handler, http};
 
 #[unsafe(no_mangle)]
-pub extern "Rust" fn init_handler(handler: Option<&mut Handler>) {
+pub extern "C" fn init_handler(handler: Option<&mut Handler>) {
     let handler = handler.unwrap();
 
     handler.get("/count", |req: &mut HttpRequest| {