dtls fails to build in OS X 10.10 which ships with OpenSSL 0.9.8zg. configure.ac should require >= 1.0.1 instead of 0.9.5.

-----

gstdtlsconnection.c:613:3: error: use of undeclared identifier 'SRTP_PROTECTION_PROFILE'
  SRTP_PROTECTION_PROFILE *profile;
  ^
gstdtlsconnection.c:613:28: error: use of undeclared identifier 'profile'
  SRTP_PROTECTION_PROFILE *profile;
                           ^
gstdtlsconnection.c:620:13: warning: implicit declaration of function 'SSL_export_keying_material' is invalid in C99 [-Wimplicit-function-declaration]
  success = SSL_export_keying_material (self->priv->ssl,
            ^
gstdtlsconnection.c:629:3: error: use of undeclared identifier 'profile'
  profile = SSL_get_selected_srtp_profile (self->priv->ssl);
  ^
gstdtlsconnection.c:629:13: warning: implicit declaration of function 'SSL_get_selected_srtp_profile' is invalid in C99 [-Wimplicit-function-declaration]
  profile = SSL_get_selected_srtp_profile (self->priv->ssl);
            ^
gstdtlsconnection.c:631:58: error: use of undeclared identifier 'profile'
  GST_INFO_OBJECT (self, "keys received, profile is %s", profile->name);
                                                         ^
/opt/oblong/deps-64-10/include/gstreamer-1.0/gst/gstinfo.h:860:95: note: expanded from macro 'GST_INFO_OBJECT'
#define GST_INFO_OBJECT(obj,...)        GST_CAT_LEVEL_LOG (GST_CAT_DEFAULT, GST_LEVEL_INFO,    obj,  __VA_ARGS__)
                                                                                                     ^
/opt/oblong/deps-64-10/include/gstreamer-1.0/gst/gstinfo.h:541:31: note: expanded from macro 'GST_CAT_LEVEL_LOG'
        (GObject *) (object), __VA_ARGS__);                             \
                              ^
gstdtlsconnection.c:633:11: error: use of undeclared identifier 'profile'
  switch (profile->id) {