revert the .map checking. riker says: ".map" files are used for other things. ".bzw" is the "correct" extension for BZFlag worlds. Checking for  others encourages their use.
revert the .map checking. riker says: ".map" files are used for other things. ".bzw" is the "correct" extension for BZFlag worlds. Checking for  others encourages their use.

git-svn-id: 67bf12f30ddf2081c31403e0b02b2123541f1680@7859 08b3d480-bf2c-0410-a26f-811ee3361c24

kongr45gpen/bzflag,kongr45gpen/bzflag,kongr45gpen/bzflag,khonkhortisan/bzflag,adamsdadakaeti/bzflag,kongr45gpen/bzflag,kongr45gpen/bzflag,adamsdadakaeti/bzflag,khonkhortisan/bzflag,adamsdadakaeti/bzflag,adamsdadakaeti/bzflag,khonkhortisan/bzflag,kongr45gpen/bzflag,adamsdadakaeti/bzflag,khonkhortisan/bzflag,khonkhortisan/bzflag,kongr45gpen/bzflag,adamsdadakaeti/bzflag,adamsdadakaeti/bzflag,kongr45gpen/bzflag,khonkhortisan/bzflag,khonkhortisan/bzflag