Update *recovery script command

another script command that rathena already having for months
http://trac.rathena.org/changeset/17321/rathena

no more atcommand @raise, @raisemap or @alive

feel free to improve the code
```
count = map->foreachpc(buildin_recovery_all_pc, revive);
```
foreachpc returns the sum of the values returned by the passed function. You can use it directly, without playing pointers.