bb_getpwuid, bb_getgrgid: change order of arguments to more intuitive one;
comment thoroughly when they die and when they dont.

diff --git a/sysklogd/logger.c b/sysklogd/logger.c
index d9c3e50..3f67aff 100644
--- a/sysklogd/logger.c
+++ b/sysklogd/logger.c
@@ -89,7 +89,7 @@
 	char name[80];
 
 	/* Fill out the name string early (may be overwritten later) */
-	bb_getpwuid(name, geteuid(), sizeof(name));
+	bb_getpwuid(name, sizeof(name), geteuid());
 	str_t = name;
 
 	/* Parse any options */