[BUG] too many open files

[bhrg3se]

Describe the bug:

File descriptors are not closed properly. Hence it us getting maxed out until TRASA is unable to create any new file descriptors including network connections.

Expected behavior:

Files and network connections should be closed after use.

Log file / Code snippet / Screenshots:

time="2020-12-15T12:45:13+05:45" level=error msg="listen.Accept failed: accept tcp [::]:8022: accept4: too many open files" func=github.com/seknox/trasa/server/accessproxy/sshproxy.ListenSSH file="sshproxy/listner.go:71" Scope of issue:

• [ ] TRASA codebase
• [ ] dashboard
• [x] server
• [ ] mobile app
• [ ] browser extension
• [ ] device agent
• [ ] website/docs