Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
MFC r237410: zlib 1.2.7.
Copy head to stable/9 as part of 9.0-RELEASE release cycle.Approved by: re (implicit)
Update to zlib 1.2.4 and add versioned symbols to thelibrary.Sponsored by: iXsystems, Inc.
Merge changes from zlib 1.2.4. Bump shared library version number.
Vendor import of zlib 1.2.4 (trimmed).