Fix http user detection

[gperdomor]

Q	A
Bug fix?	Yes
New feature?	No
BC breaks?	No
Deprecations?	No
Fixed tickets	N/A

[oanhnn]

Thank you. We see the changes of symfony's document.

$ rm -rf var/cache/* var/logs/* var/sessions/*

$ HTTPDUSER=`ps axo user,comm | grep -E '[a]pache|[h]ttpd|[_]www|[w]ww-data|[n]ginx' | grep -v root | head -1 | cut -d\  -f1`
$ sudo chmod -R +a "$HTTPDUSER allow delete,write,append,file_inherit,directory_inherit" var
$ sudo chmod -R +a "`whoami` allow delete,write,append,file_inherit,directory_inherit" var

or

$ HTTPDUSER=`ps axo user,comm | grep -E '[a]pache|[h]ttpd|[_]www|[w]ww-data|[n]ginx' | grep -v root | head -1 | cut -d\  -f1`
$ sudo setfacl -R -m u:"$HTTPDUSER":rwX -m u:`whoami`:rwX var
$ sudo setfacl -dR -m u:"$HTTPDUSER":rwX -m u:`whoami`:rwX var