add http basic auth for X-Pack plugin

[tanhaipeng]

fix #29

[coveralls]

Coverage decreased (-3.6%) to 87.126% when pulling 692b5fb on tanhaipeng:master into 490f6b2 on DhavalKapil:master.

[coveralls]

Coverage decreased (-3.6%) to 87.126% when pulling 692b5fb on tanhaipeng:master into 490f6b2 on DhavalKapil:master.

[coveralls]

Coverage decreased (-3.6%) to 87.126% when pulling 692b5fb on tanhaipeng:master into 490f6b2 on DhavalKapil:master.

[tanhaipeng]

Check how your Lua installation was built. lua_objlen is only available if you compile Lua with certain compatibility flags: https://www.lua.org/source/5.3/luaconf.h.html
It was renamed to lua_rawlen in 5.2.
You need to rebuild with -DLUA_COMPAT_5_1

lua 5.2 CI run failed

[neilcook]

I'll look at the cjson issue separately, it's a pita TBH. I'll have to build lua manually in travis rather than use the built-in lua.

Check how your Lua installation was built. lua_objlen is only available if you compile Lua with certain compatibility flags: https://www.lua.org/source/5.3/luaconf.h.html
It was renamed to lua_rawlen in 5.2.
You need to rebuild with -DLUA_COMPAT_5_1

lua 5.2 CI run failed

[neilcook]

If you can add some tests for the authentication code I'd be happy to merge.