Printf style utility functions for OpenAlias.
void AlVprintf( AlOutputType ot, const char* fmt, va_list ap )
A ’vprintf’ style output function.
The output type will be one of:
kStdout - the output will be sent to stdout
kStderr - the output will be sent to stderr
kPrompt - the output will be sent to the prompt line and it is added to the prompt line history
kErrlog - the output will be sent to the error log file
kPromptNoHistory - the output will be sent to the prompt line, but it will not be added to the history