iscsi: convert iscsi tcp to libiscsi

This patch is pretty large. It will not go through embedded (already failed once today). There was a about 2000 lines duplicated in iscsi_tcp and iscsi_iser.

diffstat 05-convert-tcp2.patch

 iscsi_tcp.c | 2899 +++++++++++++++++-------------------------------------------
 iscsi_tcp.h |  182 ---
 2 files changed, 844 insertions(+), 2237 deletions(-)

A lot of the additions in the patch is due to a rename of iscsi_tcp structs to avoid conflicts with the lib. The patch is mostly the ripping out of the code that was added in libiscsi.c and replacement with a call to the libiscsi function.

I attached the patch as a bz2 file. Sorry about this.