lib/sh/util.sh: command(): don't set err_fd to global stderr, because this prevents errors from being captured and parsed by callers. it is also not necessary to use a separate port than stderr, because stderr already contains only errors (since logging messages go to their own port). global stderr would still be useful e.g. for displaying input prompts the user when reading from global stdin.
lib/sh/util.sh: command(): don't set err_fd to global stderr, because this prevents errors from being captured and parsed by callers. it is also not necessary to use a separate port than stderr, because stderr already contains only errors (since logging messages go to their own port). global stderr would still be useful e.g. for displaying input prompts the user when reading from global stdin.