coverity-detected bug: don't free "/"

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Revert "remove static_lock()/static_unlock() and start to use thread local storage (v2)"

This reverts commit 95b422fccfed6e6f5973c768c0cfdbca65c68e67.

Conflicts:
	src/lxc/utils.c
Revert "coverity-detected bug: don't free "/""

This reverts commit 5cad2f04bec614a84e872f68697b5092a409d5a1.
Fix invalid free() in lxc_global_config_value().

Commit 4878dac496543dae0a26f5c1156bbfda63c8ea62 introduced possible
incorrect usage of free().
Also remove unneeded strdup().

Signed-off-by: Andrey Mazo <mazo@telum.ru>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
configure: Add GnuTLS to configure overview

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
configure: Disable python3 builds with clang

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
doc: Update Japanese lxc-stop(1) for -s option

Update for commit 25070b660187b61aa4e969db01b55d1360639543

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
doc: Fix the description of -n option in lxc-info(1)

Commit 5444216 revised -n option from allowing to specify multiple
containers using regex to specifying only one container. But
lxc-info(1) remains original. so
- mark -n required
- remove the description of -n that is included in common options

Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>