TS-2094: eliminate xcrun warnings at configure time

xcrun doesn't support the --show-sdk-path option until Xcode 5. We
don't care though, because the libraries we are looking for don't
move to the SDK bundle until Xcode 5 either. It is safe to just
silence the error spew on Xcode < 5.
Fix CHANGES formatting
Updated with the new release process changes
Updated with new release process.
clean up links&formatting in (most) logging related docs.
TS-2116: Making buffer_upload compile
TS-2114: removing true/false definition
update CHANGES for TS-2114 and TS-2116
doc: document proxy.config.url_remap.filename
TS-2116: create buffer_upload temp files with mode 0600
remove unnecessary Connection::setup_mc_send() compatibility wrapper
remove unused defines from P_DNSConnection.h
remove unused proxy_name from proxy/Main.cc
TS-2107: change proxy.config.http.transaction_active_timeout_in

split proxy.config.http.transaction_active_timeout_in to proxy.config.http.transaction_header_timeout_in
and proxy.config.http.transaction_request_timeout_in.
TS-2137: Use relative timeout in EventNotify::timedwait()

1) Use relative timeout in EventNotify::timedwait() function.
2) Remove unused m_name variable.
3) Use the correct marco HAVE_EVENTFD instead of TS_HAS_EVENTFD which
   is outdated.

Signed-off-by: Yunkai Zhang <qiushu.zyk@taobao.com>
doc: bump docs version for RTD
TS-2147: Set server_share_sessions to 1 for 'internal' transactions in rfc5861 plugin.
TS-2137: Forgot to add header guide in EventNotify.h

Signed-off-by: Yunkai Zhang <qiushu.zyk@taobao.com>
Revert "TS-2143 Remove alarm email address support (and config)."

This reverts commit 821d3fdd058c730aeba596bf2480fa8efb1ab27b.
Undo 2143.