... and remove it from the dist tarball. It has served its time, it
barely gets updated anymore and "everything curl" is now convering all
this document once tried to include, and does it more and better.

In the compressed scenario, this removes ~15K data from the binary,
which is 25% of the -M output.

It remains in the git repo for now for as long as the web site builds a
page using that as source. It renders poorly on the site (especially for
mobile users) so its not even good there.

Closes #3587

Do not generate line with the current date, such as:

* Generation time: Tue Oct-24 18:01:41 2017

This will improve reproducibility. The generated string is only
part of a comment, so there should be no adverse consequences.

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>

closes #2026

- Enable execute permission (chmod +x)

- Change interpreter to /usr/bin/env perl

Ref: https://github.com/curl/curl/issues/1743

... as part of hugehelpgz rodata to make build reproducible.

See https://reproducible-builds.org/ for why this is good

Closes #1490

This is nowadays included with the base perl distribution, but wasn't
prior to about perl 5.14

This eliminates the need for an external gzip program, which wasn't
working with Busybox's gzip, anyway. It now compresses using perl's
IO::Compress::Gzip

- Get rid of this flood of warnings in Windows mingw build:
warning: missing terminating " character

The warning is due to the carriage return. When msysgit checks out files
from the repo by default it converts the line endings to CRLF. Prior to
this change when mkhelp.pl processed the MANUAL and curl.1 in CRLF
format the trailing carriage returns caused unnecessary CR in the
output.

This allows configure --disable-manual to run and build without having
to regenerate the src/tool_hugehelp.c file which otherwise is necessary
since we ship tarballs with that file present.

Reported-by: Remi Gacogne
Bug: http://curl.haxx.se/bug/view.cgi?id=1350