Bump up version number to 1.2.3, LT revision to 7:1:2
Bump up version number to 1.2.3, LT revision to 7:1:2

tatsuhiro-t/spdylay,ahnan4arch/spdylay,tatsuhiro-t/spdylay,ahnan4arch/spdylay,mixianghang/spdylay,ahnan4arch/spdylay,tatsuhiro-t/spdylay,mixianghang/spdylay,mixianghang/spdylay,mixianghang/spdylay,tatsuhiro-t/spdylay,mixianghang/spdylay,ahnan4arch/spdylay,tatsuhiro-t/spdylay,ahnan4arch/spdylay