small typo pointed out by Mike Hommey slightly improved the --c14n

* xmlIO.c: small typo pointed out by Mike Hommey
* doc/xmllint.xml, xmllint.html, xmllint.1: slightly improved
  the --c14n description, c.f. #144675 .
* nanohttp.c nanoftp.c: applied a first simple patch from
  Mike Hommey for $no_proxy, c.f. #133470
* parserInternals.c include/libxml/parserInternals.h
  include/libxml/xmlerror.h: cleanup to avoid 'error' identifier
  in includes #
* parser.c SAX2.c debugXML.c include/libxml/parser.h:
  first version of the inplementation of parsing within
  the context of a node in the tree #142359, new function
  xmlParseInNodeContext(), added support at the xmllint --shell
  level as the "set" function
* test/scripts/set* result/scripts/* Makefile.am: extended
  the script based regression tests to instrument the new function.
Daniel
diff --git a/Makefile.am b/Makefile.am
index 95e504f..29880f0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -505,14 +505,15 @@
 	  if [ -f $$xml ] ; then \
 	  if [ ! -f $(srcdir)/result/scripts/$$name ] ; then \
 	      echo New test file $$name ; \
-	      $(CHECKER) $(top_builddir)/xmllint --shell $$xml < $$i > $(srcdir)/result/scripts/$$name ; \
+	      $(CHECKER) $(top_builddir)/xmllint --shell $$xml < $$i > $(srcdir)/result/scripts/$$name 2> $(srcdir)/result/scripts/$$name.err ; \
 	      grep "MORY ALLO" .memdump  | grep -v "MEMORY ALLOCATED : 0";\
 	  else \
-	      log=`$(CHECKER) $(top_builddir)/xmllint --shell $$xml < $$i 2>&1 > result.$$name ; \
+	      log=`$(CHECKER) $(top_builddir)/xmllint --shell $$xml < $$i > result.$$name 2> result.$$name.err ; \
 	      grep "MORY ALLO" .memdump  | grep -v "MEMORY ALLOCATED : 0";\
-	      diff $(srcdir)/result/scripts/$$name result.$$name` ; \
+	      diff $(srcdir)/result/scripts/$$name result.$$name ; \
+	      diff $(srcdir)/result/scripts/$$name.err result.$$name.err` ; \
 	      if [ -n "$$log" ] ; then echo $$name result ; echo $$log ; fi ; \
-	      rm result.$$name ; \
+	      rm result.$$name result.$$name.err ; \
 	  fi ; fi ; done)
 
 Catatests : xmlcatalog$(EXEEXT)