Program Settings: add Default Cursor Style (v1.8 feature).
Edit Directory Entry: add Data Bits, Stop Bits, Parity (serial),
Defer Negotiate (Telnet/TelnetS), Fake Comm Rate (network), and
clarify Comm Rate is serial-only. Add Telnet/TelnetS qualifier to
Binmode Broken.
Command-line: add -L30 to supported values.
Also fix RTC/CTS typo (should be RTS/CTS).
Expand the Alt+U entry to describe the new protocol-first flow, the
ZMODEM Batch and YMODEM Batch variants, and the cross-reference to
the multi-file picker.