Update to reflect 3.16 or older kernels and the header mismatch in ArchLinux on ARM.

diff --git a/README b/README
index 807683084acf3229959313a8c29eaeea001c66ec..17c1c5e674e3984e92c6842b27f0a0b936827ef1 100644 (file)
--- a/README
+++ b/README
@@ -61,6 +61,19 @@ be assumed to be reachable until they either stop being a router or expire.
 BSD systems where this has been fixed or is known to work are:
     NetBSD-7.99.3
 
+Linux prior to 3.17 won't allow userland to manage IPv6 temporary addresses.
+Either upgrade or don't allow dhcpcd to manage the RA,
+so don't set either "ipv6ra_own" or "slaac private" in dhcpcd.conf if you
+want to have working IPv6 temporary addresses.
+SLAAC private addresses are just as private, just stable.
+
+ArchLinux presently sanitises all kernel headers to the latest version
+regardless of the version for your CPU. As such, Arch presently ships a
+3.12 kernel with 3.17 headers which claim that it suppors temporary address
+management and no automatic prefix route generation, both of which are
+obviously false. You will have to patch support either in the kernel or
+out of the headers (or dhcpcd itself) to have correct operation.
+
 We try and detect how dhcpcd should interact with system services at runtime.
 If we cannot auto-detect how do to this, or it is wrong then
 you can change this by passing shell commands to --serviceexists,