ISCSI-LS : Change from popt to the slightly less portable getopt_long

win32 and amiga/aros does not have getopt_long() so we will need a
replacement for the platforms where getopt_long() is missing.
ISCSI-INQ:  convert to getopt_long instead of popt
ISCSI-READCAPACITY16  convert to getopt_long()
convert iscsi-dd to use getopt_long()
iscsi-support.c does not need popt.h
covnert the old test suite grom popt to getopt_long
Get rid of the popt dependency