[*] UNIX Processes: fix overmap regression in (d166a00d) and added support for envblock updates missing in (d166a00d)

Source/Processes/AuProcess.Unix.cpp

@@ -481,7 +481,34 @@ namespace Aurora::Processes
         }
     #endif
 
+        if (this->type_ != ESpawnType::eSpawnOvermap)
+        {
             ::setsid();
+        }
+        
+        if (!this->startup_.bInheritEnvironmentVariables)
+        {
+            try
+            {
+                AuList<AuString> keys;
+                
+                for (const auto &[key, value] : AuProcess::EnvironmentGetAll())
+                {
+                    keys.push_back(key);
+                }
+
+                AuProcess::EnvironmentRemoveMany(keys);
+            }
+            catch (...)
+            {
+                SysPanic("Couldn't fork");
+            }
+        }
+
+        if (this->startup_.environmentVariables.size())
+        {
+            SysAssert(AuProcess::EnvironmentSetMany(this->startup_.environmentVariables));
+        }
     
     #if defined(AURORA_IS_XNU_DERIVED)
         if (this->startup_.workingDirectory)