*: BB_BANNER -> bb_banner (it is not a const or #define)!
correct_password: explain in detail why it is ok to use bb_banner
fsck_minix: make it print bb version, not it's own (outdated/irrelevant) one

Marginal size difference:
   text    data     bss     dec     hex filename
 679119    2700   15632  697451   aa46b busybox_old
 679091    2700   15632  697423   aa44f busybox_unstripped


diff --git a/libbb/messages.c b/libbb/messages.c
index 56cccaf..8cab2dc 100644
--- a/libbb/messages.c
+++ b/libbb/messages.c
@@ -12,8 +12,7 @@
 #else
 #define BANNER "BusyBox v" BB_VER " (" BB_EXTRA_VERSION ")"
 #endif
-const char BB_BANNER[] = BANNER;
-const char bb_msg_full_version[] = BANNER " multi-call binary";
+const char bb_banner[] = BANNER;
 
 const char bb_msg_memory_exhausted[] = "memory exhausted";
 const char bb_msg_invalid_date[] = "invalid date '%s'";