pothos server stdio nonbuffered mode

[guruofquality]

The server can backup and die if the caller process isnt reading stdout/stderr.

• One solution is to set unbuffered mode in the server
• Other solution, remote/server.cpp needs to read

[guruofquality]

Did both solutions to be precautionary:

• https://github.com/pothosware/pothos/commit/5c264b66b5fe8f344d4fb3f4b287de7c468e545c
• https://github.com/pothosware/pothos/commit/0d5920871d92566cc01a76cebfa558c65610639b