OpenZFS 7252 - compressed zfs send / receive

OpenZFS 7252 - compressed zfs send / receive
OpenZFS 7628 - create long versions of ZFS send / receive options

Authored by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Paul Dagnelie <pcd@delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov@delphix.com>
Reviewed by: Sebastien Roy <sebastien.roy@delphix.com>
Reviewed by: David Quigley <dpquigl@davequigley.com>
Reviewed by: Thomas Caputi <tcaputi@datto.com>
Approved by: Dan McDonald <danmcd@omniti.com>
Reviewed by: David Quigley <dpquigl@davequigley.com>
Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Ported-by: bunder2015 <omfgbunder@gmail.com>
Ported-by: Don Brady <don.brady@intel.com>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

Porting Notes:
- Most of 7252 was already picked up during ABD work.  This
  commit represents the gap from the final commit to openzfs.
- Fixed split_large_blocks check in do_dump()
- An alternate version of the write_compressible() function was
  implemented for Linux which does not depend on fio.  The behavior
  of fio differs significantly based on the exact version.
- mkholes was replaced with truncate for Linux.

OpenZFS-issue: https://www.illumos.org/issues/7252
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/5602294
Closes #6067

cmd/zfs/zfs_main.c

@@ -32,6 +32,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
+#include <getopt.h>
 #include <libgen.h>
 #include <libintl.h>
 #include <libuutil.h>
@@ -3771,8 +3772,23 @@ zfs_do_send(int argc, char **argv)
 	nvlist_t *dbgnv = NULL;
 	boolean_t extraverbose = B_FALSE;
 
+	struct option long_options[] = {
+		{"replicate",	no_argument,		NULL, 'R'},
+		{"props",	no_argument,		NULL, 'p'},
+		{"parsable",	no_argument,		NULL, 'P'},
+		{"dedup",	no_argument,		NULL, 'D'},
+		{"verbose",	no_argument,		NULL, 'v'},
+		{"dryrun",	no_argument,		NULL, 'n'},
+		{"large-block",	no_argument,		NULL, 'L'},
+		{"embed",	no_argument,		NULL, 'e'},
+		{"resume",	required_argument,	NULL, 't'},
+		{"compressed",	no_argument,		NULL, 'c'},
+		{0, 0, 0, 0}
+	};
+
 	/* check options */
-	while ((c = getopt(argc, argv, ":i:I:RDpvnPLet:c")) != -1) {
+	while ((c = getopt_long(argc, argv, ":i:I:RDpvnPLet:c", long_options,
+	    NULL)) != -1) {
 		switch (c) {
 		case 'i':
 			if (fromname)