Update dosemu.ini documentation of string substitutions

exec/dosemu.ini

@@ -9,11 +9,12 @@
 ; $CTRLDIR = path to synchronet ctrl dir
 ; $NODEDIR = path to synchronet node dir
 ; $DOSEMUBIN = path to dosemu.bin
-; $VIRTCONF = appends virtual when needed (ie fossil) (-I"serial { virtual com 1 }")
+; $VIRTUALCONF = appends virtual when needed (ie fossil) (-I"serial { virtual com 1 }")
 ; $DOSEMUCONF = path to global dosemu conf
 ; $EXTBAT = batch file to execute (external.bat)
 ; $EXTLOG = external log (used on events)
-; add -I'keystroke "\r"' if you need that behavior back
+; $RUNTYPE = FOSSIL or STDIO
+; $NNUM = node number
 ;
 ; for com/uart/fossil i/o external programs, put it in the global "cmd" key
 ; for intercept i/o programs, you can override by putting "cmd" key under [stdio] section