d43ba46807
This gives the user a way to easily pass options to the command routines. Currently only the STDERR option is implemented and can be used to adjust what shall be done with error output of the called command (most usefully, it can be used to silence it). Signed-off-by: Petr Baudis <pasky@suse.cz> Signed-off-by: Junio C Hamano <junkio@cox.net>