Set locale to system default UTF-8

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Answering my own question: On Ubuntu the default LANG is defined in /etc/default/locale:

jeroen@dev:~⟫ cat /etc/default/locale
# Created by cloud-init v. 0.7.7 on Wed, 29 Jun 2016 11:02:51 +0000
LANG="en_US.UTF-8"

So in R we could do something like:

readRenviron("/etc/default/locale")
LANG <- Sys.getenv("LANG")
if(nchar(LANG))
   Sys.setlocale("LC_ALL", LANG)

Apache also has a line in /etc/apache2/envvars that can be uncommented to enable this.

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