- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

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

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

Allocate and setup an interrupt vector for corrected machine checks.
For now, just print when we get the interrupt, but eventually we need
to collect the details and provide a more useful report.

Populate the sysctl tree with any MCA records we collected.
The sequence number is used as the name of a sysctl node,
under which we add the MCA records using the CPU id as the
leaf name.

Add the hw.mca.inject sysctl to provide a way to inject
MC errors and trigger machine checks.

PR: ia64/113102

Add a bit definition for invalid timestamp in the record header.

Tweak the ia64 machine check handling code to not register new sysctl nodes
while holding a spin mutex. Instead, it now shoves the machine check
records onto a queue that is later drained to add sysctl nodes for each
record. While a routine to drain the queue is present, it is not currently
called.

Reviewed by: marcel

/* -> /*- for copyright notices, minor format tweaks as necessary

Remove the definition of struct mca_guid and use the generic
struct uuid defined in <sys/uuid.h>.

Use uuid/UUID instead of guid/GUID to emphasize that the
identifiers are DCE version 1 identifiers and also to avoid
inconsistencies as much a possible.

o Add records for PCI bus and PCI device errors.
o Rename mem_platform_id to mem_oem_id.
o Minor style fixes.

Add record definition for memory checks.

o Add struct mca_guid
o Add currently known GUIDs
o Slight restyling

Machine Check Architecture (MCA) structures and constants.