- 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

Always return pathname in dl_iterate_phdr's dlpi_name, as Linux does

Linux LD_ITERATE_PHDR(3):
The dlpi_name field is a null-terminated string giving the
pathname from which the shared object was loaded.

That functionality is much more useful than returning just the short
name.

Update dl_iterate_phdr(3) to follow r272842

MFC of r272842 and r272848

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

mdoc: convert .Fd to .In, which is much nicer.

Fix cross-references.

Submitted by: pluknet
MFC after: 2 weeks

Document dl_iterate_phdr(3).

Man page is based on the OpenBSD version, extended and corrected for
the FreeBSD implementation.

MFC after: 2 weeks