Honor ignore_disable_switch for inherited DOORSTOP_INITIALIZED (#109)

Steam and self-restarts leak DOORSTOP_INITIALIZED into the new process.
Doorstop then skips Mono bootstrap even when ignore_disable_switch is
set, so BepInEx never reaches Doorstop.Entrypoint.Start.

Clear the inherited flags after config load, and use a process-local
flag for genuine in-process re-entry. Fixes the Steam/Windows case
seen with Unity Mono titles (e.g. Legend of Mortal) and the restart
path in #73.

Author: mohui666

src/bootstrap.c

@@ -10,12 +10,22 @@
 
 bool_t mono_debug_init_called = FALSE;
 bool_t mono_is_net35 = FALSE;
+static bool_t doorstop_bootstrapped = FALSE;
 
 void mono_doorstop_bootstrap(void *mono_domain) {
-    if (getenv(TEXT("DOORSTOP_INITIALIZED"))) {
+    if (doorstop_bootstrapped) {
+        LOG("Doorstop already bootstrapped in this process, skipping!");
+        return;
+    }
+    // Steam (and other launchers) can leak DOORSTOP_INITIALIZED into a new
+    // game process, the same env-isolation issue ignore_disable_switch already
+    // covers for DOORSTOP_DISABLE. Honor that switch here; use the static flag
+    // above for genuine in-process re-entry.
+    if (getenv(TEXT("DOORSTOP_INITIALIZED")) && !config.ignore_disabled_env) {
         LOG("DOORSTOP_INITIALIZED is set! Skipping!");
         return;
     }
+    doorstop_bootstrapped = TRUE;
     setenv(TEXT("DOORSTOP_INITIALIZED"), TEXT("TRUE"), TRUE);
 
     mono.thread_set_main(mono.thread_current());

src/nix/entrypoint.c

@@ -139,6 +139,11 @@ static bool_t main_module_is_unity_player(void) {
 __attribute__((constructor)) void doorstop_ctor() {
     init_logger();
     load_config();
+    if (config.ignore_disabled_env) {
+        unsetenv("DOORSTOP_INITIALIZED");
+        unsetenv("DOORSTOP_DISABLE");
+        LOG("Cleared inherited DOORSTOP_INITIALIZED / DOORSTOP_DISABLE");
+    }
 
     if (!config.enabled) {
         LOG("Doorstop not enabled! Skipping!");

src/windows/entrypoint.c

@@ -284,6 +284,11 @@ BOOL WINAPI DllEntry(HINSTANCE hInstDll, DWORD reasonForDllLoad,
 
     load_config();
     LOG("Config loaded");
+    if (config.ignore_disabled_env) {
+        SetEnvironmentVariableW(L"DOORSTOP_INITIALIZED", NULL);
+        SetEnvironmentVariableW(L"DOORSTOP_DISABLE", NULL);
+        LOG("Cleared inherited DOORSTOP_INITIALIZED / DOORSTOP_DISABLE");
+    }
 
     redirect_output_log(paths);