MFC r302856:

Fix up the order in which jail creation processes are run, to preserve
the config file's order in the non-parallel-start case.

PR: 209112

MFC r298562:

Make jail(8) interpret escape codes in fstab the same as getfsent(3).

PR: 208663

MFC r294183:

Clear errno before calling getpw*.

MFC r294196:

Don't bother checking an ip[46].addr netmask/prefixlen. This is already
handled by ifconfig, and it was doing it wrong when the paramater included
extra ifconfig options.

PR: 205926

MFC r289677:

Fix a ton of speelling errors

MFC r278323:

Add mount.procfs jail parameter, so procfs can be mounted when a prison's
root is in its fstab.

Also fix a typo while I'm at it.

PR: 197237 197066

MFC r275906:

Setgid before running a command as a specified user. Previously only
initgroups(3) was called, what isn't quite enough. This brings jail(8)
in line with jexec(8), which was already doing the right thing.

PR: 195984

MFC r269522

Added support for extra ifconfig args to jail ip4.addr & ip6.addr params

This allows for CARP interfaces to be used in jails e.g.
ip4.addr = "em0|10.10.1.20/32 vhid 1 pass MyPass advskew 100"

r269340 will not be MFC'ed as mentioned due to the slim window and the
amount of additional commits required to support it.

Sponsored by: Multiplay

MFC 256385:

- Add mount.fdescfs parameter to jail(8). This is similar to
mount.devfs but mounts fdescfs. The mount happens just after
mount.devfs.

- rc.d/jail now displays whole error message from jail(8) when a jail
fails to start.

Approved by: re (gjb)

MFC r278323:

Add mount.procfs jail parameter, so procfs can be mounted when a prison's
root is in its fstab.

Also fix a typo while I'm at it.

PR: 197237 197066

MFC r275906:

Setgid before running a command as a specified user. Previously only
initgroups(3) was called, what isn't quite enough. This brings jail(8)
in line with jexec(8), which was already doing the right thing.

PR: 195984

MFC r269522

Added support for extra ifconfig args to jail ip4.addr & ip6.addr params

This allows for CARP interfaces to be used in jails e.g.
ip4.addr = "em0|10.10.1.20/32 vhid 1 pass MyPass advskew 100"

r269340 will not be MFC'ed as mentioned due to the slim window and the
amount of additional commits required to support it.

Sponsored by: Multiplay

MFC 256385:

- Add mount.fdescfs parameter to jail(8). This is similar to
mount.devfs but mounts fdescfs. The mount happens just after
mount.devfs.

- rc.d/jail now displays whole error message from jail(8) when a jail
fails to start.

Approved by: re (gjb)