line options), keep track of runas group and runas user matches
separately. Only return a positive match if we have a match for
both runas user and runas group (if specified).
one reference itself and another is added by sudo_getgr{gid,nam}
and sudo_getpw{uid,nam}. The final ref on the runas and user passwd
and group structs are persistent for now.
Set adminstrative domain for the process when looking up user's
password or group info and when preparing for execve().
Include strings.h even if string.h exists since they may define
different things. Fixes warnings on AIX and others.
an -I flag is specified. The files in the compat dir could get away
with double quotes here but I've converted all the source files
to use angle brackets for consistency.
