Putting any programs in .shrc file leads to following error:

This bug is related to c9530ae:

• .shrc file is executed by source.lua,
• which starts a shell process and tells it to continue with environment and the shell command
  

  OpenComputers/src/main/resources/assets/opencomputers/loot/openos/bin/source.lua

  Line 33 in ae644f3

  process.internal.continue(source_proc, _ENV, line)

• but shell after c9530ae does not expect environment as its argument and passes it to /lib/sh.lua itself,
  

  OpenComputers/src/main/resources/assets/opencomputers/loot/openos/bin/sh.lua

  Line 44 in ae644f3

  return sh.execute(_ENV, ...)

• and that creates an error.

Possible way to fix: replace https://github.com/MightyPirates/OpenComputers/blob/master-MC1.7.10/src/main/resources/assets/opencomputers/loot/openos/bin/source.lua#L33 with process.internal.continue(source_proc, line).

Related to #3548

we've decided to revert a fix for sh command actions that caused some regression. this issue is fixed by that revert. thank you