Continue calling step() while displaying the shell banner.  This
potentially allows TCP connections to close gracefully after a failed
boot attempt.

Inspired-by: Guo-Fu Tseng <cooldavid@cooldavid.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Access to the gpxe.org and etherboot.org domains and associated
resources has been revoked by the registrant of the domain.  Work
around this problem by renaming project from gPXE to iPXE, and
updating URLs to match.

Also update README, LOG and COPYRIGHTS to remove obsolete information.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Signed-off-by: Marty Connor <mdc@etherboot.org>

Add FILE_LICENCE declarations to almost all files that make up the
various standard builds of gPXE.

This change allows the time for which shell banners are displayed to
be configured in the config.h file.  The ability to access the shell
can also be effectively disabled by setting this timeout to zero.

Signed-off-by: Alexey Zaytsev <alexey.zaytsev@gmail.com>

list.

Added FEATURE() macros to most relevant (non-driver) files.

and generate DHCP options to indicate features to DHCP server (and to
PXE NBPs).

it's a serial console and remembers state from the previous program
run.