More cleanup and sorting on header section

OK tb@ and he also pointed out that for consistency with rest of the tree we
should include termios.h instead of sys/ttydefaults.h, where applicable

Set as __dead a few more functions, that don't return, on games/

With precious tip, help and also OK from tb@

In preparation for getline and getdelim additions to libc, rename getline()
occurrences to get_line().
Based on a diff from Jan Klemkow <j-dot-klemkow-at-wemelug-dot-de> to tech.

ISO C police: log and expl are reserved for the C library.
expl -> expl_string
log -> logit

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

2451 lines of strdup/sprintf/strcpy whacking. mostly ok'd by pjanzen
already, but he may have later changes to make still.

Manual cleanup of remaining userland __P use (excluding packages maintained outside the tree)

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be don

Part one of userland __P removal. Done with a simple regexp with some minor hand editing to make comments line up correctly. Another pass is forthcoming that handles the cases that could not be done automatically.

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improved interactive input and minor tweaks

Check malloc() return value.

Clean up lint and -Wall output

Import of gomoku from 4.4BSD Lite2. Uses ocurses.