Libiscsi: iSER implementation

This commit includes all iSER implementation in libscsi
library and utilities.

Also, adding iser option in url.

Change-Id: I55ca8a9d4db802e72eb991061260dbb0bd0ef9ba
Signed-off-by: Roy Shterman <roysh@mellanox.com>

include/iscsi.h

@@ -53,7 +53,8 @@ struct scsi_iovec;
   "<host>[:<port>]\""
 
 enum iscsi_transport_type {
-	TCP_TRANSPORT = 0
+	TCP_TRANSPORT = 0,
+	ISER_TRANSPORT = 1
 };
 
 EXTERN void iscsi_set_cache_allocations(struct iscsi_context *iscsi, int ca);
@@ -150,6 +151,7 @@ struct iscsi_url {
        char target_passwd[MAX_STRING_SIZE + 1];
        int lun;
        struct iscsi_context *iscsi;
+       enum iscsi_transport_type transport;
 };
 
 /*
@@ -270,6 +272,7 @@ EXTERN int iscsi_init_transport(struct iscsi_context *iscsi,
  */
 EXTERN int iscsi_set_alias(struct iscsi_context *iscsi, const char *alias);
 
+
 /*
  * Set the iqn name of the taqget to login to.
  * The target name must be set before a normal-login can be initiated.