Added PT/SC headers and CVS ID keyword.

exec/cntnodes.src

exec/dir.src

exec/dir_attr.inc

exec/file_io.inc

exec/file_io.src

exec/major.src

exec/matrix.src

exec/nodedefs.inc

exec/noyesbar.src

exec/pcboard.src

exec/qnet.src

exec/sdos.src

exec/simple.src

exec/type.src

exec/wildcat.src

exec/wiplogin.src

exec/wipshell.src

exec/yesnobar.src