debian/git-email: make recommends on IO::Socket::SSL versioned
Version 1.951 (2013-07-03) of libio-socket-ssl-perl introduced the
following change:
use Net::SSLeay::CTX_set_default_verify_paths to use openssl's builtin
defaults for CA unless CA path/file was given (or IO::Socket::SSL builtins
used)
From v1.8.5.5~5^2 (send-email: /etc/ssl/certs/ directory may not be
usable as ca_path, 2014-01-15) on, git relies on that behavior.
Declare the dependency.
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>