[gjc] color for status msg under roster is half between fg and bg color no matter the state (selected or not)

we now show status message under contact name in roster thanks to initial patch by Michał Sobiegraj. if you do not like that, go to prefs and uncheck it. dimgrey to become white when row is selected

           to an available resource with a negative priority; if the
           only available resource has a negative priority, the server
           SHOULD handle the message as if there were no available
           resources (defined below). so forbidding negative prio

ChangeStatusMessageDialog now shows the last_status_message even when we choose "change status message" menuitem

at the end of the account creatio we don't need to enter the password if we entered it in the paramteres (even is save pass is not checked)

new event: ACC_NOT_OK when account creation failed

SRV records are now properly supported (swich to another SRV record when first one is not available)

add some test when we create / modify an account (a valid JID can have no nickname according to the RFC, but an account MUST have one)