zcip: code size optimizations, improved help text and comments

function                                             old     new   delta
packed_usage                                       24750   24787     +37
run                                                  658     655      -3
pick                                                  40      34      -6
arp                                                  186     177      -9
zcip_main                                           1402    1356     -46
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/4 up/down: 37/-64)            Total: -27 bytes

1 files changed, 4 insertions, 1 deletions

diff --git a/include/usage.h b/include/usage.h
index 8f6013ede..d2478641c 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -4680,8 +4680,11 @@
        "Manage a ZeroConf IPv4 link-local address\n" \
      "\nOptions:" \
      "\n        -f              Run in foreground" \
-     "\n        -q              Quit after address (no daemon)" \
+     "\n        -q              Quit after obtaining address" \
      "\n        -r 169.254.x.x  Request this address first" \
      "\n        -v              Verbose" \
+     "\n" \
+     "\nWith no -q, runs continuously monitoring for ARP conflicts," \
+     "\nexits only on I/O errors (link down etc)" \
 
 #endif /* __BB_USAGE_H__ */