Remove $Id$ tags, update URL's, and more

- remove obsolete svn '$Id$' tags from all source files
- update .fl files and generated files accordingly
- replace 'http://www.fltk.org' URL's with 'https://...'
- replace bug report URL 'str.php' with 'bugs.php'
- remove trailing whitespace
- fix other whitespace errors flagged by Git
- add and/or fix missing or wrong standard headers
- convert tabs to spaces in all source files

The only relevant code changes are in the fluid/ folder where
some .fl files and other source files were used to generate
the '$Id' headers and footers.

1 files changed, 3 insertions, 9 deletions

diff --git a/FL/gl.h b/FL/gl.h
index bd0e8b6e6..4579be21a 100644
--- a/FL/gl.h
+++ b/FL/gl.h
@@ -1,6 +1,4 @@
 //
-// "$Id$"
-//
 // OpenGL header file for the Fast Light Tool Kit (FLTK).
 //
 // Copyright 1998-2018 by Bill Spitzak and others.
@@ -16,11 +14,11 @@
 // the file "COPYING" which should have been included with this file.  If this
 // file is missing or damaged, see the license at:
 //
-//     http://www.fltk.org/COPYING.php
+//     https://www.fltk.org/COPYING.php
 //
-// Please report all bugs and problems on the following page:
+// Please see the following page on how to report bugs and issues:
 //
-//     http://www.fltk.org/str.php
+//     https://www.fltk.org/bugs.php
 //
 
 /**
@@ -97,7 +95,3 @@ FL_EXPORT int  gl_texture_pile_height();
 FL_EXPORT void gl_draw_image(const uchar *, int x,int y,int w,int h, int d=3, int ld=0);
 
 #endif // !FL_gl_H
-
-//
-// End of "$Id$".
-//