Merge branch 'maint'

* maint:
  use obstack_printf
  scanner: restore a missing start condition
  gnulib: update
  maint: post-release administrivia
  version 2.6.1
  gnulib: update
  maint: fix some syntax-check issues
  tests: do not depend on __cplusplus to decide for C++ or C output

Conflicts:
	NEWS
	bootstrap.conf
	cfg.mk
	lib/.gitignore

tests/actions.at

@@ -1281,8 +1281,6 @@ AT_DATA_GRAMMAR([[input.y]],
 %debug
 %code requires
 {
-# include <stdio.h>
-
   typedef struct sem_type
   {
     int ival;
@@ -1291,20 +1289,21 @@ AT_DATA_GRAMMAR([[input.y]],
 
 # define YYSTYPE sem_type
 
-#ifdef __cplusplus
+]AT_SKEL_CC_IF([[
 # include <iostream>
   static void
   report (std::ostream& yyo, int ival, float fval)
   {
     yyo << "ival: " << ival << ", fval: " <<  fval;
   }
-#else
+]], [[
+# include <stdio.h>
   static void
   report (FILE* yyo, int ival, float fval)
   {
     fprintf (yyo, "ival: %d, fval: %1.1f", ival, fval);
   }
-#endif
+]])[
 }
 
 %code