Prisoner feature bugfix (#110)

* Allow game to continue after offering to surrender to enemies

* Fix issues related to surrender and POW quests

- Quests were ended prematurely if one had prisoners in both alma and tixa
- Strategic status flags for rescue/escape were not set properly
- Only the maximum amount a prison can hold will be taken as POWs, rest of the mercs will either escape or have to fight to the death, to prevent a player having unrescuable POWs
- Capturing a mercenary had a lot of functions called that should not have been, IF the merc is not going to be captured after all

* Switch all tactical surrender calls to use one unified function

* Only mercs that are capable can escape

Incapacitated mercs left behind will die.
Should probably prioritize incapacitated mercs to be captured by the enemy to prevent needless deaths

* Combine pow quest state changes into one function

* Add JumpIntoEscapedSector to header file

* Allow enemy to demand surrender even if they already have POWs in Tixa and Alma

* Remove surrender from UB

* Address review feedback

Strategic/strategicmap.h

@@ -119,7 +119,7 @@ void GetMapFileName(INT16 sMapX,INT16 sMapY, INT8 bSectorZ, STR8 bString, BOOLEA
 
 // Called from within tactical.....
 void JumpIntoAdjacentSector( UINT8 ubDirection, UINT8 ubJumpCode, INT32 sAdditionalData );//dnl ch56 151009
-
+void JumpIntoEscapedSector(UINT8 ubTacticalDirection);
 
 
 BOOLEAN CanGoToTacticalInSector( INT16 sX, INT16 sY, UINT8 ubZ );
@@ -207,6 +207,7 @@ BOOLEAN HandlePotentialBringUpAutoresolveToFinishBattle( int pSectorX, int pSect
 BOOLEAN MapExists( UINT8 * szFilename );
 
 BOOLEAN EscapeDirectionIsValid( INT8 * pbDirection );
+bool IsEscapeDirectionValid(WorldDirections pbDirection);
 //Used for determining the type of error message that comes up when you can't traverse to
 //an adjacent sector.	THESE VALUES DO NOT NEED TO BE SAVED!
 extern BOOLEAN	gfInvalidTraversal;
@@ -235,4 +236,4 @@ BOOLEAN CanRequestMilitiaReinforcements( INT16 sMapX, INT16 sMapY, INT16 sSrcMap
 // Bob: check and try to fix issues with squad and group assignment
 UINT8 tryToRecoverSquadsAndMovementGroups(SOLDIERTYPE* pCharacter);
 
-#endif
+#endif