src/lib/libc/string/strnstr.c, branch releng/11.3

Revert r330897:

2018-03-29T02:50:57Z

This was intended to be a non-functional change. It wasn't. The commit message was thus wrong. In addition it broke arm, and merged crypto related code. Revert with prejudice. This revert skips files touched in r316370 since that commit was since MFCed. This revert also skips files that require $FreeBSD$ property changes. Thank you to those who helped me get out of this mess including but not limited to gonzo, kevans, rgrimes. Requested by: gjb (re)

Partial merge of the SPDX changes

2018-03-14T03:19:51Z

These changes are incomplete but are making it difficult to determine what other changes can/should be merged. No objections from: pfg

Renumber clauses to reduce diffs to other versions

2013-05-28T20:57:40Z

NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3, so follow suit to make comparison easier.

- ANSIfy function definitions

2009-02-03T17:58:20Z

- use nul when we are looking for a terminating character where appropriate Approved by: imp

Per Regents of the University of Calfornia letter, remove advertising

2007-01-09T00:28:16Z

clause. # If I've done so improperly on a file, please let me know.

Don't read more than the given 'len' bytes from the 'big' string.

2005-02-11T21:07:51Z

PR: misc/77369 Submitted by: Ed Maste MFC after: 1 week

rcsid[]->__FBSDID

2001-11-07T19:55:16Z

Add a new libc function, strnstr(3), which allows one to limit the

2001-10-09T01:29:56Z

number of characters that are searched. This is especially useful with file operations and non-NUL terminated strings. Silence from: -audit, -hackers MFC after: 5 days