detect errant carriage return codes and signal the user about it
detect errant carriage return codes and signal the user about it

"goslowjimbo" presented us with a hal file which had a sequence like
    net ....^Mnet ...
which was intended to be two lines.  This case is now an error.  DOS-style line
endings (^M^J) are a warning, but won't stop executing the HAL file.

backport candidate

araisrobo/machinekit,cdsteinkuehler/MachineKit,ianmcmahon/linuxcnc-mirror,ArcEye/machinekit-testing,unseenlaser/linuxcnc,araisrobo/machinekit,bmwiedemann/linuxcnc-mirror,cdsteinkuehler/linuxcnc,aschiffler/linuxcnc,ArcEye/machinekit-testing,kinsamanka/machinekit,EqAfrica/machinekit,bobvanderlinden/machinekit,cdsteinkuehler/linuxcnc,cdsteinkuehler/linuxcnc,RunningLight/machinekit,mhaberler/machinekit,EqAfrica/machinekit,cdsteinkuehler/MachineKit,cnc-club/linuxcnc,cdsteinkuehler/MachineKit,cnc-club/linuxcnc,Cid427/machinekit,strahlex/machinekit,araisrobo/machinekit,Cid427/machinekit,strahlex/machinekit,ArcEye/MK-Qt5,yishinli/emc2,unseenlaser/linuxcnc,RunningLight/machinekit,araisrobo/machinekit,bobvanderlinden/machinekit,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,unseenlaser/machinekit,RunningLight/machinekit,unseenlaser/machinekit,mhaberler/machinekit,yishinli/emc2,ArcEye/machinekit-testing,EqAfrica/machinekit,aschiffler/linuxcnc,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,RunningLight/machinekit,strahlex/machinekit,mhaberler/machinekit,ikcalB/linuxcnc-mirror,bobvanderlinden/machinekit,cnc-club/linuxcnc,bobvanderlinden/machinekit,araisrobo/linuxcnc,narogon/linuxcnc,narogon/linuxcnc,cnc-club/linuxcnc,aschiffler/linuxcnc,araisrobo/linuxcnc,ArcEye/MK-Qt5,cdsteinkuehler/MachineKit,aschiffler/linuxcnc,Cid427/machinekit,mhaberler/machinekit,unseenlaser/machinekit,ianmcmahon/linuxcnc-mirror,narogon/linuxcnc,bmwiedemann/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,ArcEye/machinekit-testing,cnc-club/linuxcnc,mhaberler/machinekit,cdsteinkuehler/linuxcnc,kinsamanka/machinekit,ArcEye/machinekit-testing,Cid427/machinekit,Cid427/machinekit,jaguarcat79/ILC-with-LinuxCNC,ArcEye/MK-Qt5,araisrobo/linuxcnc,jaguarcat79/ILC-with-LinuxCNC,bobvanderlinden/machinekit,bmwiedemann/linuxcnc-mirror,EqAfrica/machinekit,kinsamanka/machinekit,mhaberler/machinekit,bobvanderlinden/machinekit,RunningLight/machinekit,kinsamanka/machinekit,strahlex/machinekit,kinsamanka/machinekit,ikcalB/linuxcnc-mirror,cdsteinkuehler/linuxcnc,ikcalB/linuxcnc-mirror,yishinli/emc2,strahlex/machinekit,araisrobo/machinekit,ArcEye/MK-Qt5,cdsteinkuehler/linuxcnc,unseenlaser/machinekit,RunningLight/machinekit,kinsamanka/machinekit,bobvanderlinden/machinekit,araisrobo/machinekit,aschiffler/linuxcnc,araisrobo/machinekit,kinsamanka/machinekit,ArcEye/MK-Qt5,araisrobo/machinekit,mhaberler/machinekit,RunningLight/machinekit,cnc-club/linuxcnc,araisrobo/linuxcnc,araisrobo/machinekit,jaguarcat79/ILC-with-LinuxCNC,jaguarcat79/ILC-with-LinuxCNC,ArcEye/machinekit-testing,ArcEye/machinekit-testing,ikcalB/linuxcnc-mirror,araisrobo/linuxcnc,cdsteinkuehler/MachineKit,unseenlaser/machinekit,bmwiedemann/linuxcnc-mirror,ArcEye/MK-Qt5,ikcalB/linuxcnc-mirror,EqAfrica/machinekit,ArcEye/MK-Qt5,bmwiedemann/linuxcnc-mirror,ianmcmahon/linuxcnc-mirror,strahlex/machinekit,RunningLight/machinekit,ArcEye/machinekit-testing,unseenlaser/machinekit,ikcalB/linuxcnc-mirror,mhaberler/machinekit,unseenlaser/linuxcnc,Cid427/machinekit,ArcEye/MK-Qt5,ianmcmahon/linuxcnc-mirror,EqAfrica/machinekit,Cid427/machinekit,ianmcmahon/linuxcnc-mirror,cdsteinkuehler/MachineKit,narogon/linuxcnc,bmwiedemann/linuxcnc-mirror,unseenlaser/machinekit,bobvanderlinden/machinekit,strahlex/machinekit,unseenlaser/linuxcnc,Cid427/machinekit,jaguarcat79/ILC-with-LinuxCNC,EqAfrica/machinekit,unseenlaser/linuxcnc,EqAfrica/machinekit,yishinli/emc2,cnc-club/linuxcnc,narogon/linuxcnc