Support for TURN/TLS.
Support for TURN/TLS.

Wrap the socket in an SSL adapter, then simply call StartSSL() on the
SSLAdapter instance.

Cloned from: https://webrtc-codereview.appspot.com/21799004/

R=juberti@chromium.org, juberti@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/14059004

Patch from Manish Jethani <manish.jethani@gmail.com>.

git-svn-id: a556c8bde68cedbc0208a1ffc78b06e9cd07f676@6852 4adac7df-926f-26a2-2b94-8c16560cd09d

Omegaphora/external_chromium_org_third_party_libjingle_source_talk,dcpang/fatline-libjingle,android-ia/platform_external_chromium_org_third_party_libjingle_source_talk,dcpang/fatline-libjingle,Omegaphora/external_chromium_org_third_party_libjingle_source_talk,Omegaphora/external_chromium_org_third_party_libjingle_source_talk,android-ia/platform_external_chromium_org_third_party_libjingle_source_talk,bpsinc-native/src_third_party_libjingle_source_talk,xin3liang/platform_external_chromium_org_third_party_libjingle_source_talk,sippet/talk,geekboxzone/lollipop_external_chromium_org_third_party_libjingle_source_talk,dcpang/fatline-libjingle,geekboxzone/lollipop_external_chromium_org_third_party_libjingle_source_talk,geekboxzone/lollipop_external_chromium_org_third_party_libjingle_source_talk,xin3liang/platform_external_chromium_org_third_party_libjingle_source_talk,Omegaphora/external_chromium_org_third_party_libjingle_source_talk,Omegaphora/external_chromium_org_third_party_libjingle_source_talk,sippet/talk,geekboxzone/lollipop_external_chromium_org_third_party_libjingle_source_talk,dcpang/fatline-libjingle,bpsinc-native/src_third_party_libjingle_source_talk,dcpang/fatline-libjingle,xin3liang/platform_external_chromium_org_third_party_libjingle_source_talk,sippet/talk,bpsinc-native/src_third_party_libjingle_source_talk,android-ia/platform_external_chromium_org_third_party_libjingle_source_talk,Omegaphora/external_chromium_org_third_party_libjingle_source_talk,geekboxzone/lollipop_external_chromium_org_third_party_libjingle_source_talk,bpsinc-native/src_third_party_libjingle_source_talk,android-ia/platform_external_chromium_org_third_party_libjingle_source_talk,android-ia/platform_external_chromium_org_third_party_libjingle_source_talk,xin3liang/platform_external_chromium_org_third_party_libjingle_source_talk,sippet/talk,bpsinc-native/src_third_party_libjingle_source_talk,sippet/talk,xin3liang/platform_external_chromium_org_third_party_libjingle_source_talk,android-ia/platform_external_chromium_org_third_party_libjingle_source_talk,bpsinc-native/src_third_party_libjingle_source_talk