PHRAS-275 #fix client_max_body_size for nginx
PHRAS-272 #fix database connection if no database provided
PHRAS-194 #fix update po template
update locales
Move crossdomain generator command to bin/setup
PHRAS-270 #time 6h
nb: exiftool MUST be updated - issue opened
PHRAS-270 #time 3h
erase blank fields when writing metadatas = write back every field of the STRUCTURE, not only fields of the record.
Merge pull request #1147 from nlegoff/3-8-6-reoponed

[3.8.6] Close re-opened tickets
Merge pull request #1155 from nlegoff/rebased-PHRAS-270

[3.8][PHRAS-270] Fix metadata rewriting
Fix users right