Possible bug in init.m

[deleonja]

Problem

Users on Windows and Mac report QMB aborts on load.
Likely caused by issues in the initialization file.

Known issues

• Timeout of 0.5s for network check is too short (Windows/Mac
  need more time for DNS, HTTPS handshake, and firewall)
• `ToString[Round[AbsoluteTime[]]]` can produce a decimal number,
  making the URL invalid on some systems
• `URLRead` errors are not silenced, can abort loading
• `!=` for string comparison is fragile in WL, should be `=!=`
• `Get[]` calls have no error handling if a submodule is missing

Proposed fixes

See conversation for corrected version of the init file."