Do not fail password check if shadow password does not exist -
fall back to ordinary one
Reduced usage of functions returning datain static buffers.
(mostly passwd/group/shadow related):
function old new delta
correct_password 143 193 +50
sulogin_main 490 533 +43
adduser_main 732 774 +42
passwd_main 1875 1915 +40
addgroup_main 330 365 +35
bb_internal_getspnam 38 - -38
bb_internal_fgetpwent 38 - -38
bb_internal_fgetgrent 38 - -38
static.resultbuf 168 88 -80
static.buffer 1872 1104 -768
------------------------------------------------------------------------------
(add/remove: 0/3 grow/shrink: 5/2 up/down: 210/-962) Total: -752 bytes
8 files changed