Retire legacy test infrastructure

* Removed zpios kmod, utility, headers and man page.

* Removed unused scripts zpios-profile/*, zpios-test/*,
  zpool-config/*, smb.sh, zpios-sanity.sh, zpios-survey.sh,
  zpios.sh, and zpool-create.sh.

* Removed zfs-script-config.sh.in.  When building 'make' generates
  a common.sh with in-tree path information from the common.sh.in
  template.  This file and sourced by the test scripts and used
  for in-tree testing, it is not included in the packages.  When
  building packages 'make install' uses the same template to
  create a new common.sh which is appropriate for the packaging.

* Removed unused functions/variables from scripts/common.sh.in.
  Only minimal path information and configuration environment
  variables remain.

* Removed unused scripts from scripts/ directory.

* Remaining shell scripts in the scripts directory updated to
  cleanly pass shellcheck and added to checked scripts.

* Renamed tests/test-runner/cmd/ to tests/test-runner/bin/ to
  match install location name.

* Removed last traces of the --enable-debug-dmu-tx configure
  options which was retired some time ago.

Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6509

module/Makefile.in

@@ -3,7 +3,6 @@ subdir-m += nvpair
 subdir-m += unicode
 subdir-m += zcommon
 subdir-m += zfs
-subdir-m += zpios
 subdir-m += icp
 
 INSTALL_MOD_DIR ?= extra

module/icp/illumos-crypto.c

@@ -152,5 +152,7 @@ icp_init(void)
 #if defined(_KERNEL) && defined(HAVE_SPL)
 module_exit(icp_fini);
 module_init(icp_init);
+MODULE_AUTHOR(ZFS_META_AUTHOR);
 MODULE_LICENSE(ZFS_META_LICENSE);
+MODULE_VERSION(ZFS_META_VERSION "-" ZFS_META_RELEASE);
 #endif

module/zpios/Makefile.in

@@ -1,10 +0,0 @@
-src = @abs_top_srcdir@/module/zpios
-obj = @abs_builddir@
-
-MODULE := zpios
-
-EXTRA_CFLAGS = $(ZFS_MODULE_CFLAGS) @KERNELCPPFLAGS@
-
-obj-$(CONFIG_ZFS) := $(MODULE).o
-
-$(MODULE)-objs += pios.o