doc: Choose a non-ambiguous name for the license section; use genuine quotation.

doc/starpu.texi

@@ -22,9 +22,9 @@ This manual documents StarPU @value{VERSION}.
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3
 or any later version published by the Free Software Foundation;
-with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
-See the GNU Free Documentation License in @ref{Licence} for more
-details.
+with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+Texts.  A copy of the license is included in the section entitled ``GNU
+Free Documentation License''.
 @end quotation
 @end copying
 
@@ -50,7 +50,6 @@ details.
 
 @node Top
 @top Preface
-@cindex Preface
 
 This manual documents the usage of StarPU version @value{VERSION}.  It
 was last updated on @value{UPDATED}.
@@ -76,6 +75,8 @@ was last updated on @value{UPDATED}.
 
 * Full source code for the 'Scaling a Vector' example::
 * Function Index::              Index of C functions.
+
+* GNU Free Documentation License::    How you can copy and share this manual.
 @end menu
 
 @c ---------------------------------------------------------------------
@@ -5070,7 +5071,8 @@ static struct starpu_sched_policy_s dummy_sched_policy = @{
 
 @include vector_scal_opencl_codelet.texi
 
-@node Licence
+
+@node GNU Free Documentation License
 @appendix GNU Free Documentation License
 @include fdl-1.3.texi