- Transer ssh_webproxy_connect() function
- Transer NX conditional error messages with `NX>207` prefix
- Transer NX-specific host key verification logic

**sshconnect2.c:**
- Reorder authentication methods for NX modes
- Transer password reading from stdin for NX modes
- Transer retry limit for `NxAuthOnlyModeEnabled`

**readpass.c:**
- Move NX wrapper `read_passphrase()` to take into account new 9.6 features (SSH_ASKPASS_REQUIRE, prompt hints)