SVID functions used in bb

[Peter S. Mazinger]

Hello!

Sorry for cross-posting, both lists are affected.

I am intending to add an uClibc config option that disables the SVID 
(System V R4) only functions in uClibc (the common BSD/SVID ones remain
untouched for now). These are fgetpwent[_r]/fgetgrent[_r]/putpwent/stime.

Checking how this influences busybox I found:
1. *_r are used only to pwd_grp to provide the non-reentrant version of 
the same function.
2. the non-reentrant fget* are used in adduser/addgroup, additionally 
adduser uses putpwent
3. stime is used by date/rdate

Checking my (uClibc based) box w/ about 500 packages, the fget* functions 
are not used at all, putpwent is used by shadow suite, stime by only 
net-snmp.

Please consider replacing all the above in busybox using SuSv3 versions, 
else uClibc users will have to enable bb-internal libpwdgrp and disable 
date/rdate.

Thanks, Peter

-- 
Peter S. Mazinger <ps dot m at gmx dot net>           ID: 0xA5F059F2
Key fingerprint = 92A4 31E1 56BC 3D5A 2D08  BB6E C389 975E A5F0 59F2