another try to get sshpty.c compiling on bsd
fixing FreeBSD build hopefully
oops, sig should have been signal
Hopefully make the HAVE_DEV_PTMX path work.
Fix fatal() macro
#define log printf in B2 stubs
- it is now possible to make the serial drivers pipe their input/output to programs by using a '|' followed by a command line as the modem or printer port setting (instead of a device name like '/dev/ttyS0') [Brian Johnson] - the option "--config FILE" tells B2 to use a different config file
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