[fix] parameter check to avoid notification msg from PHP (thanks Christian)
[fix] ensure that private content is never listed through news feeds, whatever setting of 'users_without_teasers' global parameter
[fix] avoid notification messages from test script when geoip is not installed
[fix] document and review the way yacs determine language for the community, for the surfer, for the current web page
[clean] remove code that was commented out
[geolocation] add max_distance parameter to the function that look for nearby locations, and give it a smaller value than before
[factoring] functions get_permalink() now return full links, that include host name and root path, for articles, categories, files, sections and users -- useful for virtual hosts
[clean] add some documentation related to geolocation computations