Use correct case for Oblivion and Nehrim Plugins.txt

This makes a difference when using case-sensitive filesystems, though
files like plugins.txt and Skyrim.ccc/Fallout4.ccc may still contain
plugin names in the wrong case.

I've checked all other games (besides the VR games, which I don't own
copies of) and they all use lowercase plugins.txt. I've also checked all
the other hardcoded file and folder names used, and they're all correct.

ffi/tests/ffi.c

@@ -146,9 +146,9 @@ void test_lo_get_active_plugins_file_path() {
 
   assert(return_code == 0);
 #ifdef _WIN32
-  assert(strcmp(path, "../../testing-plugins/Oblivion\\plugins.txt") == 0);
+  assert(strcmp(path, "../../testing-plugins/Oblivion\\Plugins.txt") == 0);
 #else
-  assert(strcmp(path, "../../testing-plugins/Oblivion/plugins.txt") == 0);
+  assert(strcmp(path, "../../testing-plugins/Oblivion/Plugins.txt") == 0);
 #endif
   lo_free_string(path);
   lo_destroy_handle(handle);
@@ -330,7 +330,7 @@ int main(void) {
   test_lo_get_plugin_position();
   test_lo_get_indexed_plugin();
 
-  remove("testing-plugins/Oblivion/plugins.txt");
+  remove("testing-plugins/Oblivion/Plugins.txt");
   printf("SUCCESS\n");
   return 0;
 }

ffi/tests/ffi.cpp

@@ -149,9 +149,9 @@ void test_lo_get_active_plugins_file_path() {
 
   assert(return_code == 0);
 #ifdef _WIN32
-  assert(strcmp(path, "../../testing-plugins/Oblivion\\plugins.txt") == 0);
+  assert(strcmp(path, "../../testing-plugins/Oblivion\\Plugins.txt") == 0);
 #else
-  assert(strcmp(path, "../../testing-plugins/Oblivion/plugins.txt") == 0);
+  assert(strcmp(path, "../../testing-plugins/Oblivion/Plugins.txt") == 0);
 #endif
   lo_free_string(path);
   lo_destroy_handle(handle);
@@ -357,7 +357,7 @@ int main(void) {
 
   test_thread_safety();
 
-  remove("testing-plugins/Oblivion/plugins.txt");
+  remove("testing-plugins/Oblivion/Plugins.txt");
   printf("SUCCESS\n");
   return 0;
 }

src/game_settings.rs

@@ -310,7 +310,7 @@ fn oblivion_plugins_file_path(game_path: &Path, local_path: &Path) -> PathBuf {
         game_path
     };
 
-    parent_path.join("plugins.txt")
+    parent_path.join("Plugins.txt")
 }
 
 fn use_my_games_directory(ini_path: &Path) -> bool {
@@ -740,7 +740,7 @@ mod tests {
         )
         .unwrap();
         assert_eq!(
-            Path::new("local/plugins.txt"),
+            Path::new("local/Plugins.txt"),
             settings.active_plugins_file()
         );
 
@@ -831,7 +831,7 @@ mod tests {
             GameSettings::with_local_path(GameId::Oblivion, &game_path, &Path::new("local"))
                 .unwrap();
         assert_eq!(
-            game_path.join("plugins.txt"),
+            game_path.join("Plugins.txt"),
             *settings.active_plugins_file()
         );
     }