astraceroute: Don't duplicate copyright/bug report/license string

Move the copyright/bug report/license string to an own constant and use
it for the output of help() and version() to avoid duplication and
prevent the strings from getting out of sync.  This makes the text
section of astraceroute.o slightly smaller:

before:
   text	   data	    bss	    dec	    hex	filename
  18481	      0	      4	  18485	   4835	astraceroute/astraceroute.o

after:
   text	   data	    bss	    dec	    hex	filename
  18201	      0	      4	  18205	   471d	astraceroute/astraceroute.o

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

0 files changed, 0 insertions, 0 deletions