Explain more clearly what it takes to make a customization permanent.

Explain global vs local minor modes first thing, then list the modes.
C-u TAB works only in certain modes.
(define-minor-mode): Use eval-after-load
to delay the call to <mode> for global minor modes.
(easy-mmode-define-navigation): Only recenter if interactive.
Extended the kludge to interoperate with the
delsel and pending-del packages wrt to the new function
`c-electric-delete-forward'.
(ange-ftp-file-modtime): Check a 213 response
from the server for the format we expect.  Don't use it if it
doesn't look like what the Internet draft for FTP extensions
specifies.
Cleaned up.
From Luis Fernandes <elf@ee.ryerson.ca>.
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(winner-equal): Make it a defun.  Don't compare Winner
configurations with compare-window-configuration; they aren't
window configurations.
(ad-make-advised-definition): If the
original definition has an interactive form, but is Elp
instrumented, use the interactive form of the function called by
elp-wrapper.
(toplevel): Include <signal.h> and "syssignal.h".
(vox_configure, vox_close) [SIGIO]: Block/unblock SIGIO
around ioctls.
Fix the header line and the copyright years.
(add_to_log): Do nothing if called asynchronously.
Fix a typo.
(Fx_create_frame): Initialize frame colors to -1,
for the case that x_decode_colors signals an error.
(unload_color): Do nothing if PIXEL is -1.
(normal-top-level): Don't operate on the initial
frame if we failed to create one.
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(describe-function-1): When printing FUNCTION's
documentation, don't assume FUNCTION is a symbol.
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(rmail-show-message): Show beginning of message in
all windows containing it.