https://gitlab.synchro.net/main/sbbs/-/commit/830d29d7bfddf53ef01e0d70
Modified Files:
src/syncterm/ssh.h
Log Message:
SyncTERM: guard SFTP externs in ssh.h on WITHOUT_DEUCESSH

The squash in 961d4d4631 moved the sftp_state / sftp_available
externs (and the sftp.h include they need) from sftp_session.h
into ssh.h. Worked fine in DeuceSSH builds but broke the no-SSH
configuration: telnets.c includes ssh.h to reach init_crypt()
and friends, and pulled in sftp.h transitively Ä but sftp.h
isn't on the include path when the SFTP library isn't built.

Wrap the sftp.h include and the two externs in
`#ifndef WITHOUT_DEUCESSH`. Function declarations
(init_crypt, ssh_connect, etc.) stay unguarded Ä telnets.c
still calls those. stdatomic.h moves inside the same guard
since only the _Atomic bool extern needed it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

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