Don't build host-xz needlessly

Since commit d1f325f554cab (xzcat: treat as host prerequisite and build if
needed) host-xz is always built when the host does not have xz installed.
Removed all other host-xz dependencies.

[Peter: don't drop for host-squashfs, as that needs libxz development files]
Cc: Thomas De Schampheleire <patrickdepinguin+buildroot@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
harfbuzz: fix static linking of test programs when toolchain has threads support

Fixes http://autobuild.buildroot.net/results/701/701a1a260a58a81f45b3b9eae7eb47b400e05b37/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
package/exim: uses fork(), needs an MMU

Fixes:
    http://autobuild.buildroot.net/results/95d/95ddd8e9be96f3808612db02642d72cfe77b3c26/

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Romain Naour<romain.naour@openwide.fr>
Acked-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
libubox: Disable lua binding on no mmu

The Lua binding option of libubox need to be
explicitly disabled on no mmu case.

Fixes:
http://autobuild.buildroot.net/results/1a5/1a5c50f8ca0ae70c1e0d3733765f521790b97a30/build-end.log

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
libuci: Disable lua binding on no mmu

Same error as in libubox package.
http://autobuild.buildroot.net/results/1a5/1a5c50f8ca0ae70c1e0d3733765f521790b97a30/build-end.log

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
snmppp: fix missing includes

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
snmppp: update download URL

The filename of the SNMP++ sources has changed.
The old one is still working because the server automatically redirects to the
new file, but it is safer to use the official name.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
snmppp: add option to enable logging

SNMP++ logging can be overly verbose, and according to the SNMP++
documentation, disabling logging "increases performance drastically and
minimizes memory consumption".

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
snmppp: add option to disable SNMPv3 support

Disabling SNMPv3 support also removes the dependency on OpenSSL, which is
pretty large (over 2 MB of uncompressed filesystem size on an ARM926 platform).

BR2_PACKAGE_SNMPPP_SNMPV3 defaults to yes for backward compatibility with
previous Buildroot releases, where SNMPv3 was always enabled.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
agentpp: new package

[Peter: add threads dependency, style fixes]
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>