Add NOECHOE and TEST_L to the list of SHOPT options (#242)

src/cmd/ksh93/bltins/print.c:
- Rename the unlisted and misleadingly named SHOPT_ECHOE option
  (which disables, not enables, 'echo -e') to SHOPT_NOECHOE.

src/cmd/ksh93/SHOPT.sh:
- Add the SHOPT_NOECHOE and SHOPT_TEST_L compile time options to
  the list of SHOPT options. Since there is a probe for TEST_L,
  set it to probe (empty) by default. NOECHE is off by default.

src/cmd/ksh93/features/options:
- Small bugfix: Allow SHOPT_TEST_L to be manually enabled on
  systems that don't support '$(whence -p test) -l /foo'.
- Add a comment describing the SHOPT_MULTIBYTE feature test and
  separate it from the SHOPT_DEVFD test.

src/cmd/ksh93/SHOPT.sh

@@ -25,6 +25,7 @@ SHOPT HISTEXPAND=1			# csh-style history file expansions
 SHOPT KIA=				# ksh -R <outfile> <script> generates cross-ref database from script
 SHOPT MULTIBYTE=1			# multibyte character handling
 SHOPT NAMESPACE=1			# allow namespaces
+SHOPT NOECHOE=0				# turn off 'echo -e' when SHOPT_ECHOPRINT is disabled
 SHOPT OLDTERMIO=			# support both TCGETA and TCGETS
 SHOPT OPTIMIZE=1			# optimize loop invariants
 SHOPT PFSH=0				# solaris exec_attr(4) profile execution (obsolete)
@@ -37,6 +38,7 @@ SHOPT SPAWN=				# use spawnveg for fork/exec
 SHOPT STATS=1				# add .sh.stats variable
 SHOPT SUID_EXEC=1			# allow (safe) suid/sgid shell scripts
 SHOPT SYSRC=				# attempt . /etc/ksh.kshrc if interactive
+SHOPT TEST_L=				# add 'test -l' as an alias for 'test -L'
 SHOPT TIMEOUT=				# number of seconds for shell timeout
 SHOPT TYPEDEF=1				# enable typeset type definitions
 SHOPT VSH=1				# vi edit mode

src/cmd/ksh93/bltins/print.c

@@ -125,7 +125,7 @@ static char* 	nullarg[] = { 0, 0 };
 	{
 		if(strcmp(argv[1],"-n")==0)
 			prdata.echon = 1;
-#if !SHOPT_ECHOE
+#if !SHOPT_NOECHOE
 		else if(strcmp(argv[1],"-e")==0)
 			prdata.raw = 0;
 		else if(strcmp(argv[1],"-ne")==0 || strcmp(argv[1],"-en")==0)
@@ -133,7 +133,7 @@ static char* 	nullarg[] = { 0, 0 };
 			prdata.raw = 0;
 			prdata.echon = 1;
 		}
-#endif /* SHOPT_ECHOE */
+#endif /* SHOPT_NOECHOE */
 		else
 			break;
 		argv++;

src/cmd/ksh93/features/options

@@ -28,6 +28,8 @@ tst	note{ SHOPT_* option probe }end cross{
 	# process substitutions instead of FIFOs, which are not as secure
 	ls /dev/fd/9 9<&0 >/dev/null 2>&1
 	option DEVFD $?
+
+	# test for multibyte support
 	case  `echo a | tr a '\012' | wc -l` in
 	*1*)	option MULTIBYTE 0 ;;
 	esac
@@ -40,7 +42,7 @@ tst	note{ SHOPT_* option probe }end cross{
 	# SHOPT_TEST_L so ksh supports it for compatibility with local scripts
 	ln -s /dev/null "$EXECROOT/link$$"
 	env test -l "$EXECROOT/link$$" 2>/dev/null && env test ! -l . 2>/dev/null
-	option TEST_L $?
+	[ $? = 0 ] && option TEST_L 0
 	rm -f "$EXECROOT/link$$"
 
 	# if one of these exists, make SHOPT_SYSRC load /etc/ksh.kshrc by default