Adjust/reformat text of LICENSING.txt

* README.md (Installation and Usage, Copyright & Warranty): Refine
information about LICENSING.txt file.
* doc/LICENSING.txt: Rename sysdeps folder to atomic_ops/sysdeps;
reformat text a bit; do not mention "sample applications" (because
only tests are available).

2 files changed, 12 insertions, 9 deletions

diff --git a/README.md b/README.md
index 755a7ce..9b67c68 100644
--- a/README.md
+++ b/README.md
@@ -62,7 +62,7 @@ However, two small libraries are built and installed:
 * `libatomic_ops.a` is a support library, which is not needed on some
   platforms. This is intended to be usable, under some mild restrictions,
   in free or proprietary code, as are all the header files.
-  See doc/LICENSING.txt.
+  See doc/LICENSING.txt for more details about the licensing.
 
 * `libatomic_ops_gpl.a` contains some higher level facilities.  This code is
   currently covered by the GPL.  The contents currently correspond to
@@ -130,4 +130,5 @@ The file gcc/sh.h is
 
  * Copyright (c) 2009 by Takashi YOSHII. All rights reserved.
 
-See [LICENSING.txt](doc/LICENSING.txt) for the details.
+Please be aware of the dual nature of the license of libatomic_ops,
+see [LICENSING.txt](doc/LICENSING.txt) for the details.
diff --git a/doc/LICENSING.txt b/doc/LICENSING.txt
index c6e1640..dca21d7 100644
--- a/doc/LICENSING.txt
+++ b/doc/LICENSING.txt
@@ -3,7 +3,7 @@ both free and proprietary software.  Hence most code that we expect to be
 linked into a client application is covered by an MIT-style license.
 
 A few library routines are covered by the GNU General Public License.
-These are put into a separate library, libatomic_ops_gpl.a .
+These are put into a separate library, libatomic_ops_gpl.a file.
 
 The low-level part of the library is mostly covered by the following
 license:
@@ -32,8 +32,9 @@ SOFTWARE.
 
 --------------------------------
 
-A few files in the sysdeps directory were inherited in part from the
-Boehm-Demers-Weiser conservative garbage collector, and are covered by
+
+A few files in the atomic_ops/sysdeps directory were inherited in part from
+the Boehm-Demers-Weiser conservative garbage collector, and are covered by
 its license, which is similar in spirit:
 
 --------------------------------
@@ -51,11 +52,12 @@ modified is included with the above copyright notice.
 
 ----------------------------------
 
+
 A few files are covered by the GNU General Public License.  (See file
-"COPYING".) This applies only to test code, sample applications,
-and the libatomic_ops_gpl portion of the library.
-Thus libatomic_ops_gpl should generally not be linked into proprietary code.
-(This distinction was motivated by patent considerations.)
+"COPYING".)  This applies only to the test code and the libatomic_ops_gpl
+portion of the library.  Thus, libatomic_ops_gpl should generally not be
+linked into proprietary code.  (This distinction was motivated by patent
+considerations.)
 
 It is possible that the license of the GPL pieces may be changed for
 future versions to make them more consistent with the rest of the package.