fix(mods): BepInEx_Valheim prevents startup on systems with newer glibc

Load the libdoorstop_x64.so solely for the dedicated server executable
and not for the whole startup routine, which causes errors in startup or
not loading the mods at all. (see #4149 and #4491)

lgsm/modules/fix_vh.sh

@@ -34,7 +34,7 @@ if [ -f "${modsinstalledlistfullpath}" ]; then
 		export DOORSTOP_CORLIB_OVERRIDE_PATH=./unstripped_corlib
 
 		export LD_LIBRARY_PATH="./doorstop_libs:${LD_LIBRARY_PATH}"
-		export LD_PRELOAD="libdoorstop_x64.so:${LD_PRELOAD}"
+		preexecutable="LD_PRELOAD=\"libdoorstop_x64.so:${LD_PRELOAD}\" ${preexecutable}"
 
 		export SteamAppId=892970
 	fi