ash: in bash compat mode, always export $SHLVL

function                                             old     new   delta
ash_main                                            1437    1442      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
libbb: fix parsing of "10101010" date/time form

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
iplink: fix build with kernel versions prior to 2.6.23

Signed-off-by: Eugene Rudoy <gene.devel@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
nc: fix option bit positions. Closes 6926

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>