fix for boost>=1.86
commit d1f485ff9ffc40bd264de0d057a3b5d06eda02c5

Index: client/ServerRunner.h
--- client/ServerRunner.h.orig.port
+++ client/ServerRunner.h
@@ -44,10 +44,23 @@ class ServerThreadRunner : public IServerRunner, boost
 };
 
 #ifndef VCMI_MOBILE
+// Enable support for running vcmiserver as separate process. Unavailable on mobile systems
+#define ENABLE_SERVER_PROCESS
+#endif
 
+#ifdef ENABLE_SERVER_PROCESS
+
+#if BOOST_VERSION >= 108600
 namespace boost::process {
+inline namespace v1 {
 class child;
 }
+}
+#else
+namespace boost::process {
+class child;
+}
+#endif
 
 /// Class that runs server instance as a child process
 /// Available only on desktop systems where process management is allowed
