- Copy stable/10@285827 to releng/10.2 in preparation for 10.2-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.2.
- Update default pkg(8) configuration to use the quarterly branch.[1]

Discussed with: re, portmgr [1]
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r267004,r274592:

r267004 (by gahr):

- Use strlen instead of hardcoding a number
- Terminate a sentence with a period

Approved by: cognet

r274592 (by ngie):

Convert tools/regression/lib/libc/stdio/test-fmemopen into an ATF testcase and
rename as lib/libc/stdio/fmemopen2_test

Sponsored by: EMC / Isilon Storage Division

Convert tools/regression/lib/libc/stdio/test-fmemopen into an ATF testcase and
rename as lib/libc/stdio/fmemopen2_test

Sponsored by: EMC / Isilon Storage Division

- Use strlen instead of hardcoding a number
- Terminate a sentence with a period

Approved by: cognet

- Return NULL and set errno to EINVAL if size is 0 (as required by POSIX).
Update the manpage to reflect this change.
- Always set the current position to the first null-byte when opening in append
mode. This makes the implementation compatible with glibc's. Update the test
suite.

Reported by: pho
Approved by: cognet

- Fix more style(9)-related issues (copyright header, spaces after function
names, unnecessary casts)
- Change type of boolean variable from char to bool

Suggested by: jhb, zont, jmallett
Reviewed by: cognet
Approved by: cognet

- Remove underscores from the internal structure name, as it doesn't collide
with the user's namespace.

- Correct size and position variables type from long to size_t.

- Do not set errno to ENOMEM on malloc failure, as malloc already does so.

- Implement the concept of "buffer data length", which mandates what SEEK_END
refers to and the allowed extent for a read.

- Use NULL as read-callback if the buffer is opened in write-only mode.
Conversely, use NULL as write-callback when opened in read-only mode.

- Implement the handling of the ``b'' character in the mode argument. A binary
buffer differs from a text buffer (default mode if ``b'' is omitted) in that
NULL bytes are never appended to writes and that the "buffer data length"
equals to the size of the buffer.

- Remove shall from the man page. Use indicative instead. Also, specify that
the ``b'' flag does not conform with POSIX but is supported by glibc.

- Update the regression test so that the ``b'' functionality and the "buffer
data length" concepts are tested.

- Minor style(9) corrections.

Suggested by: jilles
Reviewed by: cognet
Approved by: cognet

Add fmemopen(3), an interface to get a FILE * from a buffer in memory, along
with the respective regression test.
See http://pubs.opengroup.org/onlinepubs/9699919799/functions/fmemopen.html

Reviewed by: cognet
Approved by: cognet