LGPL by reference

original commit: 981701d2378179d4ada54b7fd2608df3b89748fd

pkgs/parser-tools-pkgs/parser-tools-doc/LICENSE.txt

@@ -7,4 +7,5 @@ applications, provided you follow the rules stated in the LGPL.  You
 can also modify this package; if you distribute a modified version,
 you must distribute it under the terms of the LGPL, which in
 particular means that you must release the source code for the
-modified software.  See COPYING_LESSER.txt for more information.
+modified software.  See http://www.gnu.org/copyleft/lesser.html
+for more information.

pkgs/parser-tools-pkgs/parser-tools-lib/LICENSE.txt

@@ -7,4 +7,5 @@ applications, provided you follow the rules stated in the LGPL.  You
 can also modify this package; if you distribute a modified version,
 you must distribute it under the terms of the LGPL, which in
 particular means that you must release the source code for the
-modified software.  See COPYING_LESSER.txt for more information.
+modified software.  See http://www.gnu.org/copyleft/lesser.html
+for more information.

pkgs/parser-tools-pkgs/parser-tools/LICENSE.txt

@@ -7,4 +7,5 @@ applications, provided you follow the rules stated in the LGPL.  You
 can also modify this package; if you distribute a modified version,
 you must distribute it under the terms of the LGPL, which in
 particular means that you must release the source code for the
-modified software.  See COPYING_LESSER.txt for more information.
+modified software.  See http://www.gnu.org/copyleft/lesser.html
+for more information.