zmodem, fail on malformed images and large files [ssh]

[lunacorn]

Describe the Bug
using ssh login, and large files (12mb + ) or images with incorrect extensions result in hanging syncterm during upload process
works as expected via telnet
To Reproduce
use ssh login via your terminal upload a large file, or a improperly labeled image

Expected Behavior
upload completes

Actual Behavior
terminal hangs, and after a long period times out disconnecting from server

Screenshots
If applicable, add screenshots to help explain your problem.

Environment

• [x ] I am using Node.js v12.x LTS or higher
• [x ] npm install or yarn reports success

Fedora 34 server / archlinux running client

[NuSkooler]

Tracking file issues in #448