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/lang/english.txt

@@ -1488,6 +1488,9 @@ STR_CONFIG_SETTING_AI_IN_MULTIPLAYER                            :Allow AIs in mu
 STR_CONFIG_SETTING_AI_IN_MULTIPLAYER_HELPTEXT                   :Allow AI computer players to participate in multiplayer games
 STR_CONFIG_SETTING_SCRIPT_MAX_OPCODES                           :#opcodes before scripts are suspended: {STRING2}
 STR_CONFIG_SETTING_SCRIPT_MAX_OPCODES_HELPTEXT                  :Maximum number of computation steps that a script can take in one turn
+STR_CONFIG_SETTING_SCRIPT_MAX_MEMORY                            :Max memory usage per script: {STRING2}
+STR_CONFIG_SETTING_SCRIPT_MAX_MEMORY_HELPTEXT                   :How much memory a single script may consume before it's forcibly terminated. This may need to be increased for large maps.
+STR_CONFIG_SETTING_SCRIPT_MAX_MEMORY_VALUE                      :{COMMA} MiB
 
 STR_CONFIG_SETTING_SERVINT_ISPERCENT                            :Service intervals are in percents: {STRING2}
 STR_CONFIG_SETTING_SERVINT_ISPERCENT_HELPTEXT                   :Choose whether servicing of vehicles is triggered by the time passed since last service or by reliability dropping by a certain percentage of the maximum reliability