afssh.1.md: complete the sentence.
also print out SSH_AUTH_SOCK in debug mode
add one missing exception activation
ssh-agent-filter.bash-completion: add missing license
add CLOEXEC flag to sockets

SOCK_CLOEXEC is currently only available on linux >= 2.6.27 so fcntl is used
as a fallback.
add confirmation via ssh-askpass
add cmdline options for confirmation
improve inserting into (allow|confirm)ed_pubkeys
update bash-completion for confirmation options
add confirmed key operations

normal ssh authentications get dissected to allow the user a more
informed decision.
rfc4251.h: add #include <stdexcept>
add quotes around ssh-agent-filter's name
update documentation to mention confirmation stuff

Thanks: Christian Amsüss <chrysn@fsfe.org> for requesting that feature
ssh-askpass-noinput: a simpler confirmation dialog

this adds an ssh-askpass imlementation that will only show allow/deny
buttons and is based on zenity.
release 0.3
Merge tag '0.3' into debian

0.3
install new files: ssh-askpass-noinput(.1)
allow parallel building
update copyright for new contributor
release 0.3-1