DB/Misc: A lucky bag random fixes
SQL: Maybe I'll have more luck :(
Revert "DB/Misc: A lucky bag random fixes"

This reverts commit 3fcb1bf09140e59a878911cd889d5047cf8a0ca6.
Shared/Logs: Add workaround for "w" flag used with dynamic name files

Ignore "w" flag and always use "a" for log files with dynamic name since the file handle is created at every log line and "w" would delete any other logged line from previous _write() calls.
The best solution would be to overwrite only at first call and append at any other call.
Shared/Logs: Make AppenderFile more thread-safe

In case of dynamic file names don't store the FILE* handle in a shared class variable but keep it only at function scope.

Valgrind log:
  at _IO_un_link (genops.c:69)
  by fclose@@GLIBC_2.2.5 (iofclose.c:55)
  by AppenderFile::CloseFile() (AppenderFile.cpp:94)
  by AppenderFile::_write(LogMessage const&) (AppenderFile.cpp:66)
  by Appender::write(LogMessage&) (Appender.cpp:102)
  by Logger::write(LogMessage&) const (Logger.cpp:63)
  by Log::write(LogMessage*) (Log.cpp:279)
  by Log::vlog(std::string const&, LogLevel, char const*, __va_list_tag*) (Log.cpp:267)
  by Log::outMessage(std::string const&, LogLevel, char const*, ...) (Log.h:129)
Address 0x2a1bd2d0 is 0 bytes inside a block of size 568 free'd
  at free (vg_replace_malloc.c:468)
  by fclose@@GLIBC_2.2.5 (iofclose.c:85)
  by AppenderFile::CloseFile() (AppenderFile.cpp:94)
  by AppenderFile::_write(LogMessage const&) (AppenderFile.cpp:66)
  by Appender::write(LogMessage&) (Appender.cpp:102)
  by Logger::write(LogMessage&) const (Logger.cpp:63)
  by Log::write(LogMessage*) (Log.cpp:279)
  by Log::vlog(std::string const&, LogLevel, char const*, __va_list_tag*) (Log.cpp:267)
  by Log::outMessage(std::string const&, LogLevel, char const*, ...) (Log.h:129)
Merge pull request #12 from TrinityCore/master

pull