8145934: Make ttyLocker equivalent for Unified Logging framework
Reviewed-by: rprotacio, stuefe, jrose

8152637: Create a stack allocatable LogStream class
Reviewed-by: rehn, brutisso

8153254: Delegate (v)write from Log to LogTagSet
Reviewed-by: stefank, kbarrett

8152635: Create a UL class to represent a Log + Level combination
Reviewed-by: brutisso, mlarsson, rehn

8152632: Rename LogHandle(...) to Log(...)
Reviewed-by: brutisso, mlarsson, rprotacio

8151993: Remove inclusion of inline.hpp in log.hpp
Reviewed-by: kbarrett, stefank

8150026: Add the ability to log with variable log level
Reviewed-by: brutisso, mlarsson

8147918: Rename develop_log_is_enabled() to log_develop_is_enabled()
Reviewed-by: dholmes, brutisso

8146793: logStream::write re-formats string
Summary: Eliminate re-format, add warning attribute, fix size check, fix va_list usage.
Reviewed-by: mlarsson, rprotacio, jrose

8143229: Replace the develop level with develop macros in Unified Logging
Reviewed-by: brutisso, coleenp, dholmes, rprotacio

8142483: Unified logging log instances cause warnings on windows when only static functions are used
Reviewed-by: brutisso, sla

8138916: Logging write function does not allow for long enough messages
Summary: The unified logging framework's vwrite function is updated to allow strings longer than 512 characters, for the sake of messages of non-pre-determined length.
Reviewed-by: coleenp, dsamersoff, mlarsson

8046148: JEP 158: Unified JVM Logging
Reviewed-by: coleenp, sla