Updated to final 1.1.5 version (revision 1.56).
Merged changes from 2.0 version (revisions 1.46-1.50) by hand. Finished conversion to clists: removed flush of tty output buffer in comflush() (most writes were truncated to 256 bytes) and restored bypass of ttyinput() in siopoll(). Finished conversion to 2.0 types - more void *'s, less caddr_t's, less casts, no Dev_t's. Only these things are seriously broken now compared with 1.1.5: waiting for output complete is impossible so ttywait() can deadlock; sioclose() isn't called enough so sioopen() sometimes returns EBUSY unnecessarily; input flow control is not implemented.
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