create_help.pl now is able to process &productname; entity fix PGPRO-616

Author: vbwagner

src/bin/psql/Makefile

@@ -21,6 +21,8 @@ REFDOCDIR= $(top_srcdir)/doc/src/sgml/ref
 override CPPFLAGS := -I. -I$(srcdir) -I$(libpq_srcdir) $(CPPFLAGS)
 override LDFLAGS := -L$(top_builddir)/src/fe_utils -lpgfeutils $(libpq_pgport) $(LDFLAGS)
 
+# We need product name in the enviroment of create_help.pl
+export PRODUCT_NAME
 OBJS=	command.o common.o conditional.o copy.o crosstabview.o \
 	describe.o help.o input.o large_obj.o mainloop.o \
 	prompt.o psqlscanslash.o sql_help.o startup.o stringutils.o \

src/bin/psql/create_help.pl

@@ -100,6 +100,8 @@
 	open(my $fh, '<', "$docdir/$file") or next;
 	my $filecontent = join('', <$fh>);
 	close $fh;
+	# Substitute &productname; entity
+	$filecontent =~ s/\&productname;/$ENV{PRODUCT_NAME}/gs;
 
 	# Ignore files that are not for SQL language statements
 	$filecontent =~