Translations for configuration option keys

For some keys of the configuration options, there is no English translation available.

The affected keys are:

config.diagnostics.ambiguity-1
config.diagnostics.duplicate-index
config.diagnostics.empty-block
config.diagnostics.global-in-nil-env
config.diagnostics.lowercase-global
config.diagnostics.newfield-call
config.diagnostics.newline-call
config.diagnostics.redefined-local
config.diagnostics.redundant-parameter
config.diagnostics.redundant-value
config.diagnostics.trailing-space
config.diagnostics.undefined-env-child
config.diagnostics.undefined-global
config.diagnostics.unused-function
config.diagnostics.unused-label
config.diagnostics.unused-local
config.diagnostics.unused-vararg

[sumneko]

I'm too lazy to complete these locales, you can make a PR for them.

[carsakiller]

• config.diagnostics.ambiguity-1
• config.diagnostics.duplicate-index
• config.diagnostics.empty-block
• config.diagnostics.global-in-nil-env
• config.diagnostics.lowercase-global
• config.diagnostics.newfield-call
• config.diagnostics.newline-call
• config.diagnostics.redefined-local
• config.diagnostics.redundant-parameter
• config.diagnostics.redundant-value
• config.diagnostics.trailing-space
• config.diagnostics.undefined-env-child
• config.diagnostics.undefined-global
• config.diagnostics.unused-function
• config.diagnostics.unused-label
• config.diagnostics.unused-local
• config.diagnostics.unused-vararg