accept 'infinity' for logger.max_file_size

[hmmr]

'infinity' is a valid value for logger_disk_log_h config item max_no_bytes, and indeed may be desirable for customers wishing to have console.log to grow infinitely (see OpenRiak/cuttlefish#3).

Depends on OpenRiak/riak_logger#4.

[hmmr]

With this change, and logger.max_file_size = infinity in riak.conf:

(dev1@127.0.0.1)1> logger:i().
Primary configuration: 
    Level: info
    Filter Default: log
    Filters:
        (none)
Handler configuration: 
...
    Id: default
        Module: logger_std_h
        Level:  all
        Formatter:
            Module: logger_formatter
            Config:
                legacy_header: false
                single_line: true
                template: [time," [",level,"] ",pid,"@",mfa,":",line," ",msg,
                           "\n"]
                time_designator: 32
        Filter Default: log
        Filters:
            (none)
        Handler Config:
            burst_limit_enable: true
            burst_limit_max_count: 500
            burst_limit_window_time: 1000
            compress_on_rotate: false
            drop_mode_qlen: 200
            file: "/home/hmmr/X/titokyo/g/riak-3.4.0/dev/dev1/riak/log/console.log"
            file_check: 100
            filesync_repeat_interval: 5000
            flush_qlen: 1000
            max_no_bytes: infinity
            max_no_files: 10
            modes: [delayed_write,raw,append]
            overload_kill_enable: false
            overload_kill_mem_size: 3000000
            overload_kill_qlen: 20000
            overload_kill_restart_after: 5000
            sync_mode_qlen: 10
            type: file 
...

Note max_no_bytes: infinity.