MAN: Fix minor typos Reviewed-by: Lukáš Slebodník <lslebodn@fedoraproject.org>

MAN: Improve failover documentation by explaining the timeout better Reviewed-by: Pavel Březina <pbrezina@redhat.com>

try primary server after retry_timeout + 1 seconds when switching to backup https://fedorahosted.org/sssd/ticket/1679 The problem is when we are about to reset the server status, we don't get through the timeout (30 seconds) because the "switch to primary server" task is scheduled 30 seconds after fall back to a backup server. Thus the server status remains "not working" and is resetted after another 30 seconds. We need to make sure that the server status is tried after the timeout period. retry_timeout is currently hardcoded to 30, thus the change in man page.

Primary server support: man page, failover section

Rename server/ directory to src/ Also update BUILD.txt