bug#34462: 27.0.50; package.el breakage when features are loaded in after-init-hook

[Eli Zaretskii]

> From: Dmitry Alexandrov <321942@gmail.com>
> Date: Fri, 15 Feb 2019 04:45:59 +0300
> Cc: 34462@debbugs.gnu.org, Steve Purcell <steve@sanityinc.com>
> 
> Well, with no regard to how pdmp breaks ages-old traditions of symlinking 
> executables, either the docstring of ‘load-history’, which says that “As an 
> exception, one of the alist elements may have FILE-NAME nil”, or code that 
> assumes the opposite should be fixed, should not them?

Thanks, I think I fixed all the places where the code assumed the CAR
of a non-nil element of load-history must be a string.  The fix is on
the master branch.