Fix double-inclusion of config.h in some sources

* lib/muscript.h: Don't include config.h: the caller is responsible
for that.
* lib/guile.c: Include config.h
* lib/python.c: Likewise.
* lib/script.c: Likewise.
* lib/sieve.c: Likewise.

@@ -15,6 +15,9 @@
    You should have received a copy of the GNU General Public License
    along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
 
+#if defined(HAVE_CONFIG_H)
+# include <config.h>
+#endif
 #include "muscript.h"
 #include "muscript_priv.h"
 #include <mailutils/guile.h>

@@ -15,9 +15,6 @@
    You should have received a copy of the GNU General Public License
    along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
 
-#if defined(HAVE_CONFIG_H)
-# include <config.h>
-#endif
 #include <mailutils/sieve.h>
 #include <mailutils/diag.h>
 #include <mailutils/errno.h>

@@ -14,6 +14,9 @@
    You should have received a copy of the GNU General Public License
    along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
 
+#if defined(HAVE_CONFIG_H)
+# include <config.h>
+#endif
 #include "muscript.h"
 #include "muscript_priv.h"
 #include <mailutils/python.h>

@@ -15,6 +15,9 @@
    You should have received a copy of the GNU General Public License
    along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
 
+#if defined(HAVE_CONFIG_H)
+# include <config.h>
+#endif
 #include "muscript.h"
 #include "muscript_priv.h"
 

@@ -15,6 +15,9 @@
    You should have received a copy of the GNU General Public License
    along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>. */
 
+#if defined(HAVE_CONFIG_H)
+# include <config.h>
+#endif
 #include "muscript.h"
 #include "muscript_priv.h"