Fix some minor issues found by coverity.

OK millert@ and miko@

Restore the xmalloc(), xcalloc(), xreallocarray() and xstrdup() changes.
OK deraadt@

backout last week of csh diffs. They are disasterously broken, on i386
it becomes entirely unusable.

Replace any() with strchr(3).

OK millert@ and miko@

strsave() is hard-fail strdup() so simplify and rename to xstrdup().
with help from martijn@.

ok millert@ martijn@

Don't try to close every single file descriptor up to _SC_OPEN_MAX in csh.
Instead, close the fds that reside in between the gaps of used fds and once the
largest used fd is reached call closefrom().

Don't try to close every single file descriptor up to _SC_OPEN_MAX in csh.
Instead, close the fds that reside in between the gaps of used fds and once the
largest used fd is reached call closefrom().

ok deraadt@

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Don't call sysconf() in a loop conditional when the loop won't affect it

ok natano@ tedu@

Replace handrolled xfree() function by directly using free(3)

OK mmcc@

miscellaneous cruft:
* remove lint
* unifdef S_IFLNK, S_ISFIFO, S_ISLNK, S_ISSOCK, O_APPEND
* remove 0, NOTUSED, notdef -- untouched since original import
* remove IIASA

unifdef BUILTIN (unused), NLS (always set), SHORT_STRINGS (always set)
and remove a few unused defines; no binary changes; ok tedu@ zhuk@

delete tons more casts

delete many more ptr_t casts

Use reallocarray() and remove a few archaic memory allocation practices.
ok deraadt

remove some unnecessary sys/param.h inclusions

rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable). these days, people use source. these id's do not provide
any benefit, and do hurt the small install media
(th

rcsid[] and sccsid[] and copyright[] are essentially unmaintained (and
unmaintainable). these days, people use source. these id's do not provide
any benefit, and do hurt the small install media
(the 33,000 line diff is essentially mechanical)
ok with the idea millert, ok dms

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unused code and variables

de-register and ansify functions

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rescinded 22 July 1999.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

We live in an ANSI C world. Remove lots of gratuitous #ifdef __STDC__ cruft.

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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#if __STDC__ --> #ifdef __STDC__

Update from NetBSD (christos)
Quote all imported environment variables.

s/NOFILE/sysconf(_SC_OPEN_MAX)/

update rcsid

initial import of NetBSD tree