Add zreport function

Move the zpool list / zfs list commands in -init to the function
zreport(). This function prints the zfs/spl versions, the list of pools,
and a report of filesystems + properties we care about.

zreport can be called from a recovery shell for an easy to record
debugging picture/report.

90zfsbootmenu/zfsbootmenu-init.sh

@@ -150,15 +150,7 @@ while IFS=$'\t' read -r _pool _health; do
   fi
 done <<<"$( zpool list -H -o name,health )"
 
-zdebug "$(
-  echo "zpool list" ; \
-  zpool list
-)"
-
-zdebug "$(
-  echo "zfs list -o name,mountpoint,encroot,keystatus,keylocation,org.zfsbootmenu:keysource" ;\
-  zfs list -o name,mountpoint,encroot,keystatus,keylocation,org.zfsbootmenu:keysource
-)"
+zdebug "$( zreport )"
 
 unsupported=0
 while IFS=$'\t' read -r _pool _property; do

90zfsbootmenu/zfsbootmenu-lib.sh

@@ -2433,6 +2433,19 @@ zbmcmdline() {
   [ -f "${BASE}/zbm.cmdline" ] && echo | cat "${BASE}/zbm.cmdline" -
 }
 
+# prints: zpool list and zfs property list
+# returns: nothing
+
+zreport() {
+  cat <<-EOF
+	ZFS Version: $( modinfo -F version zfs ) / SPL Version: $( modinfo -F version spl )
+
+	$( zpool list )
+
+	$( zfs list -o name,mountpoint,encroot,keystatus,keylocation,org.zfsbootmenu:keysource )
+	EOF
+}
+
 # arg1: pid
 # prints: child pid
 # returns: 0 if a child pid was found, 1 if there are no children