Add zstreamdump(8) command to examine ZFS send streams.

Obtained from: illumos-gate revision 11935:538c866aaac6
Source: ssh://anonhg@hg.illumos.org/illumos-gate

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #905

cmd/Makefile.am

@@ -1,2 +1,2 @@
-SUBDIRS  = zfs zpool zdb zinject ztest zpios mount_zfs
+SUBDIRS  = zfs zpool zdb zinject zstreamdump ztest zpios mount_zfs
 SUBDIRS += zpool_layout zvol_id zpool_id vdev_id

cmd/zstreamdump/Makefile.am

@@ -0,0 +1,18 @@
+include $(top_srcdir)/config/Rules.am
+
+DEFAULT_INCLUDES += \
+	-I$(top_srcdir)/include \
+	-I$(top_srcdir)/lib/libspl/include
+
+sbin_PROGRAMS = zstreamdump
+
+zstreamdump_SOURCES = \
+	$(top_srcdir)/cmd/zstreamdump/zstreamdump.c
+
+zstreamdump_LDADD = \
+	$(top_builddir)/lib/libnvpair/libnvpair.la \
+	$(top_builddir)/lib/libuutil/libuutil.la \
+	$(top_builddir)/lib/libzpool/libzpool.la \
+	$(top_builddir)/lib/libzfs/libzfs.la
+
+zstreamdump_LDFLAGS = -pthread -lm $(ZLIB) -lrt -ldl $(LIBUUID) $(LIBBLKID)