bug#14385: 24.3.50; Rename the `url' defstruct (for `url-p' etc.)

[Drew Adams]

`url-p' should test whether a string is a URL.  That is naturally what
someone would expect of a function with this name.
 
This function and other `url-*' functions are misleading because the
name `url' was chosen for a Lisp structure (defstruct) that represents a
URL.  The name for this structure should be changed - e.g.,
`url-struct'.
 
 
 
In GNU Emacs 24.3.50.1 (i386-mingw-nt5.1.2600)
 of 2013-05-10 on ODIEONE
Bzr revision: 112542 rgm@gnu.org-20130510102119-fklj7xlajezey0tr
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --with-gcc (4.7) --no-opt --enable-checking --cflags
 -IC:/Devel/emacs/build/include --ldflags -LC:/Devel/emacs/build/lib'