include/libdecnumber: replace FSF postal address with licenses URL

Some of the GPLv2 boiler-plate still contained the
obsolete "51 Franklin Street" postal address.

Replace it with the canonical GNU licenses URL recommended by the FSF:
https://www.gnu.org/licenses/

Signed-off-by: Sean Wei <me@sean.taipei>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20250613.qemu.patch.04@sean.taipei>
Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/include/libdecnumber/dconfig.h b/include/libdecnumber/dconfig.h
index 2bc0ba7f..e67ecc1 100644
--- a/include/libdecnumber/dconfig.h
+++ b/include/libdecnumber/dconfig.h
@@ -23,9 +23,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 
 #if HOST_BIG_ENDIAN
diff --git a/include/libdecnumber/decContext.h b/include/libdecnumber/decContext.h
index cea6e42..5bb64e1 100644
--- a/include/libdecnumber/decContext.h
+++ b/include/libdecnumber/decContext.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------ */
 /* Decimal Context module header				      */
diff --git a/include/libdecnumber/decDPD.h b/include/libdecnumber/decDPD.h
index 26a21ec..8eb4552 100644
--- a/include/libdecnumber/decDPD.h
+++ b/include/libdecnumber/decDPD.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------------ */
 /* Binary Coded Decimal and Densely Packed Decimal conversion lookup tables */
diff --git a/include/libdecnumber/decNumber.h b/include/libdecnumber/decNumber.h
index 41bc2a0..bf37af8 100644
--- a/include/libdecnumber/decNumber.h
+++ b/include/libdecnumber/decNumber.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------ */
 /* Decimal Number arithmetic module header			      */
diff --git a/include/libdecnumber/decNumberLocal.h b/include/libdecnumber/decNumberLocal.h
index 6198ca8..0959f66 100644
--- a/include/libdecnumber/decNumberLocal.h
+++ b/include/libdecnumber/decNumberLocal.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------ */
 /* decNumber package local type, tuning, and macro definitions	      */
diff --git a/include/libdecnumber/dpd/decimal128.h b/include/libdecnumber/dpd/decimal128.h
index aff261e..c57180b 100644
--- a/include/libdecnumber/dpd/decimal128.h
+++ b/include/libdecnumber/dpd/decimal128.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------ */
 /* Decimal 128-bit format module header				      */
diff --git a/include/libdecnumber/dpd/decimal128Local.h b/include/libdecnumber/dpd/decimal128Local.h
index 9765427..2948ab2 100644
--- a/include/libdecnumber/dpd/decimal128Local.h
+++ b/include/libdecnumber/dpd/decimal128Local.h
@@ -23,9 +23,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 #if !defined(DECIMAL128LOCAL)
 
diff --git a/include/libdecnumber/dpd/decimal32.h b/include/libdecnumber/dpd/decimal32.h
index 6cb9e43..9a17933 100644
--- a/include/libdecnumber/dpd/decimal32.h
+++ b/include/libdecnumber/dpd/decimal32.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------ */
 /* Decimal 32-bit format module header				      */
diff --git a/include/libdecnumber/dpd/decimal64.h b/include/libdecnumber/dpd/decimal64.h
index f29e570..5c3d0bb 100644
--- a/include/libdecnumber/dpd/decimal64.h
+++ b/include/libdecnumber/dpd/decimal64.h
@@ -24,9 +24,8 @@
    for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GCC; see the file COPYING.  If not, write to the Free
-   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.  */
+   along with GCC; see the file COPYING.  If not, see
+   <https://www.gnu.org/licenses/>.  */
 
 /* ------------------------------------------------------------------ */
 /* Decimal 64-bit format module header				      */