MFC r297790:
r297790 (by pfg):

libc: replace 0 with NULL for pointers.

While here also cleanup some surrounding code; particularly
drop some malloc() casts.

Found with devel/coccinelle.

MFC r258580:
Replace Sun RPC license in TI-RPC library with a 3-clause BSD license,
with the explicit permission of Sun Microsystems in 2009.

MFC r258581, 258582:
Replace Sun Industry Standards Source License for Sun RPC code with a
3-clause BSD license as specified by Oracle America, Inc. in 2010.
This license change was approved by Wim Coekaerts, Senior Vice
President, Linux and Virtualization at Oracle Corporation.

MFC r259117, 259118:
Replace Sun RPC license with a 3-clause BSD license. This license change
was approved in 2010 by Wim Coekaerts, Senior Vice President, Linux and
Virtualization at Oracle Corporation.

MFC r259417:
Replace Sun RPC license for TI-RPC library with a 3-clause BSD license,
with the explicit permission of Sun Microsystems in 2009.
The code in question in this file was copied from lib/libc/rpc/pmap_getport.c.

MFC r258580:
Replace Sun RPC license in TI-RPC library with a 3-clause BSD license,
with the explicit permission of Sun Microsystems in 2009.

MFC r258581, 258582:
Replace Sun Industry Standards Source License for Sun RPC code with a
3-clause BSD license as specified by Oracle America, Inc. in 2010.
This license change was approved by Wim Coekaerts, Senior Vice
President, Linux and Virtualization at Oracle Corporation.

MFC r259117, 259118:
Replace Sun RPC license with a 3-clause BSD license. This license change
was approved in 2010 by Wim Coekaerts, Senior Vice President, Linux and
Virtualization at Oracle Corporation.

MFC r259417:
Replace Sun RPC license for TI-RPC library with a 3-clause BSD license,
with the explicit permission of Sun Microsystems in 2009.
The code in question in this file was copied from lib/libc/rpc/pmap_getport.c.