Change: Limit memory allocations for each Squirrel instance

This can avoid out-of-memory situations due to single scripts using up the entire address space.
Instead, scripts that go above the maximum are killed.
The maximum is default 1 GB per script, but can be configured by a setting.

src/table/settings.ini

@@ -1555,6 +1555,21 @@ strhelp  = STR_CONFIG_SETTING_SCRIPT_MAX_OPCODES_HELPTEXT
 strval   = STR_JUST_COMMA
 cat      = SC_EXPERT
 
+[SDT_VAR]
+base     = GameSettings
+var      = script.script_max_memory_megabytes
+type     = SLE_UINT32
+from     = SLV_SCRIPT_MEMLIMIT
+guiflags = SGF_NEWGAME_ONLY
+def      = 1024
+min      = 8
+max      = 8192
+interval = 8
+str      = STR_CONFIG_SETTING_SCRIPT_MAX_MEMORY
+strhelp  = STR_CONFIG_SETTING_SCRIPT_MAX_MEMORY_HELPTEXT
+strval   = STR_CONFIG_SETTING_SCRIPT_MAX_MEMORY_VALUE
+cat      = SC_EXPERT
+
 ##
 [SDT_VAR]
 base     = GameSettings