Keep command_fifo read fd open instead of closing/reopening

Closing/reopening the read side seems to sometimes lead to
end-of-file not being received, leaving some extra data unexecuted.

The FDWatcher stays disabled during the executing of the fifo
commands so this should not enable any more commands to be executed
until we get back from the CommandManager and reset the FDWatcher
fd to to fifo read end.

Fixes #4410

0 files changed, 0 insertions, 0 deletions