nanobsd: Fix typos

Fix a number of typos in the code or comments.
Files under dhcpd, embedded, pcengines, and rescue were intentionally
omitted. These directories will be reviewed at a later date.

PR:		269884
Reviewed by:	imp, zlei
Approved by:	emaste (mentor)
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D47587

tools/tools/nanobsd/Files/root/save_cfg

@@ -62,7 +62,7 @@ do
 			# Add to cfg (y/n/i)?
 			#	y) -> save this file in /cfg
 			#	n) -> do not save this file in /cfg for current script invocation ONLY
-			#	i) -> add file to ignore list (/cfg/.ignore hiereachy) and never save
+			#	i) -> add file to ignore list (/cfg/.ignore hierarchy) and never save
 			#	      try to add this file to /cfg.
 			#
 			# touch is used to add files to /cfg to keep the script flow straight and easy

tools/tools/nanobsd/defaults.sh

@@ -497,10 +497,10 @@ run_late_customize ( ) (
 # a user's cfg file would override this.
 #
 fixup_before_diskimage ( ) (
-	# Run the deduplication script that takes the matalog journal and
+	# Run the deduplication script that takes the metalog journal and
 	# combines multiple entries for the same file (see source for
 	# details). We take the extra step of removing the size keywords. This
-	# script, and many of the user scripts, copies, appeneds and otherwise
+	# script, and many of the user scripts, copies, appends and otherwise
 	# modifies files in the build, changing their sizes.  These actions are
 	# impossible to trap, so go ahead remove the size= keyword. For this
 	# narrow use, it doesn't buy us any protection and just gets in the way.
@@ -814,7 +814,7 @@ cust_pkgng ( ) (
 	CR "${PKGCMD} add /_.p/${_NANO_PKG_PACKAGE}"
 
 	(
-		# Expand any glob characters in pacakge list
+		# Expand any glob characters in package list
 		cd "${NANO_PACKAGE_DIR}"
 		_PKGS=`find ${NANO_PACKAGE_LIST} -not -name "${_NANO_PKG_PACKAGE}" -print | sort | uniq`
 
@@ -905,7 +905,7 @@ usage ( ) {
 # Setup and Export Internal variables
 #
 
-export_var ( ) {		# Don't wawnt a subshell
+export_var ( ) {		# Don't want a subshell
 	var=$1
 	# Lookup value of the variable.
 	eval val=\$$var
@@ -914,7 +914,7 @@ export_var ( ) {		# Don't wawnt a subshell
 }
 
 # Call this function to set defaults _after_ parsing options.
-# dont want a subshell otherwise variable setting is thrown away.
+# don't want a subshell otherwise variable setting is thrown away.
 set_defaults_and_export ( ) {
 	: ${NANO_OBJ:=/usr/obj/nanobsd.${NANO_NAME}${NANO_LAYOUT:+.${NANO_LAYOUT}}}
 	: ${MAKEOBJDIRPREFIX:=${NANO_OBJ}}

tools/tools/nanobsd/fill_pkg.sh

@@ -160,7 +160,7 @@ for i in `cat "$PL"` ; do
 	if [ -f "$NANO_PKG_DUMP/$i.pkg" ] ; then
 		$COPY "$NANO_PKG_DUMP/$i.pkg" "$NANO_PKG_DIR"
 	else
-		echo "Package $i misssing in $NANO_PKG_DUMP" 1>&2
+		echo "Package $i missing in $NANO_PKG_DUMP" 1>&2
 		exit 1
 	fi
 done

tools/tools/nanobsd/mtree-dedup.awk

@@ -84,7 +84,7 @@ function mtree_from_kvs(path, kvs)
 	return lv;
 }
 
-# Parse the mtree line into path + KVs. Use a sentinal value
+# Parse the mtree line into path + KVs. Use a sentinel value
 # for a bare keyword, which is extremely unlikely to be used
 # for real.
 function line2kv(kvs, str)