Add back the XTRN.CFG from the XTRN.LZH install package

This one includes the external editor and door configurations.

CTRL/XTRN.CFG

+1					Total External Editors
+FEdit (Full-Screen Editor)		External Editor Name
+%!fedit %f 80 %r %l S			Local Command Line
+%!dcdwatch %& %!fedit %f 80 %r %l	Remote Command Line
+YY					Single Character Options
+4					Total External Programs
+Synchronet Blackjack!			External Program Name
+					AR to access
+					AR to run
+SNYYNYNN  N				Single Character Options
+0					Execute on Event
+0					Cost to Run in Credits
+sbj					Command Line
+sbjclean				Clean-up Command Line
+..\XTRN\SBJ				Start-up Path
+Synchronet BBS List			External Program Name
+					AR to access
+					AR to run
+SNYYNNNN  N				Single Character Options
+0					Execute on Event
+0					Cost to Run in Credits
+sbl					Command Line
+					Clean-up Command Line
+..\XTRN\SBL				Start-up Path
+Dice War				External Program Name
+					AR to access
+					AR to run
+SNYYNYNN  N				Single Character Options
+0					Execute on Event
+0					Cost to Run in Credits
+dicewar					Command Line
+dwclean					Clean-up Command Line
+..\XTRN\DICEWAR				Start-up Path
+Domain Poker				External Program Name
+					AR to access
+					AR to run
+SNYYNYNN  N				Single Character Options
+0					Execute on Event
+0					Cost to Run in Credits
+dpoker					Command Line
+dpclean					Clean-up Command Line
+..\XTRN\DPOKER				Start-up Path