tftpd: options -c (allow _new_ files to be uploaded) and -u USER

function                                             old     new   delta
tftp_protocol                                       1316    1466    +150
packed_usage                                       23774   23798     +24
tftpd_main                                           509     502      -7
tftp_main                                            311     252     -59
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 174/-66)           Total: 108 bytes
   text    data     bss     dec     hex filename
 797700     641    7380  805721   c4b59 busybox_old
 797833     641    7380  805854   c4bde busybox_unstripped

1 files changed, 4 insertions, 2 deletions

diff --git a/include/usage.h b/include/usage.h
index 7fe9ad063..ad9009763 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -3977,11 +3977,13 @@
         )
 
 #define tftpd_trivial_usage \
-       "[-r] [DIR]"
+       "[-cr] [-u USER] [DIR]"
 #define tftpd_full_usage \
-       "Transfer a file on request from a tftp client.\n" \
+       "Transfer a file on tftp client's request.\n" \
      "\nOptions:" \
      "\n        -r      Prohibit upload" \
+     "\n        -c      Allow file creation via upload" \
+     "\n        -u      Access files as USER" \
 
 #define time_trivial_usage \
        "[OPTION]... COMMAND [ARGS...]"