Move watchdog timer disable check to common/utils

We may also want to check this from the plugin.

src/wine-host/utils.cpp

@@ -18,21 +18,10 @@
 
 #include <iostream>
 
-#include <boost/process/environment.hpp>
-
 #include "bridges/common.h"
 
-namespace bp = boost::process;
-
 using namespace std::literals::chrono_literals;
 
-/**
- * If this environment variable is set to `1`, then we won't enable the watchdog
- * timer. This is only necessary when running the Wine process under a different
- * namespace than the host.
- */
-constexpr char disable_watchdog_timer_env_var[] = "YABRIDGE_NO_WATCHDOG";
-
 uint32_t WINAPI
 win32_thread_trampoline(fu2::unique_function<void()>* entry_point) {
     (*entry_point)();
@@ -94,12 +83,10 @@ MainContext::MainContext()
       events_timer(context),
       watchdog_context(),
       watchdog_timer(watchdog_context) {
-    bp::environment env = boost::this_process::environment();
-
     // NOTE: We allow disabling the watchdog timer to allow the Wine process to
     //       be run from a separate namespace. This is not something you'd
     //       normally want to enable.
-    if (env[disable_watchdog_timer_env_var].to_string() == "1") {
+    if (is_watchdog_timer_disabled()) {
         std::cerr << "WARNING: Watchdog timer disabled. Not protecting"
                   << std::endl;
         std::cerr << "         against dangling processes." << std::endl;