On MongoDB failures print 20 lines of stderr and print a special error if mongod failed to start due to incompatible version of glibc.

Catch stderr before 'exit' signal

Try to give a good error message on outdated glibc/libstdc++.

Simplify error reporting to two lines.

Print only last 20 lines of stderr.

Slightly better error message.
Merge branch 'mongod-exit-message' into devel