Sorry @ryanschneider for stepping in on your fix.
Nothing is assumed now, and several checks are made. If any of the checks fail, nothing else is done in `salt.log.Logging.__new__()`.
Added a test case which will take care of possible regressions on this bug fix.
* Even when the tests logging handler stream is directed to `/dev/null` we still need a low logging level so that our custom logging handler, used to see if certain log messages are emitted or not, catches messages.
We defined that the amount of accepted keys should be lower than 1/4 of the system's max open file setting. Inform the user about the current situation, the logging level is "attached" to the gravity of the current status.
* `salt.modules.file.contains()`, `salt.modules.file.contains_regex()`, `salt.modules.file.contains_glob()` and `salt.utils.find` now do the searching/matching against chunks of data; using defaults, 32KB chunks of data in files; instead of searching/matching line by line.
* Based on the above changes `salt.states.file.append()`, when checking if the text to append is already present, now uses `salt.modules.file.contains_regex()` in order to match spanning multiple lines ignoring the addition/deletion of white-space or new lines, except inside commas.
* The regex used on the above item is built at runtime using `salt.utils.build_whitepace_splited_regex()`, just feed the text to it and you'll get back the proper regex to the matching/searching on, for example `salt.modules.file.contains_regex()`.
* Added tests for all this code.
This commit kind of reverts the previous "no more os.sep.join ..." commit by solving the issue which led to switching that code to `os.path.join`. Tested both on linux and windows.
On the parsers cleanup branch, I though about making the available options as equal as possible. Since the log_file setting for the master and the minion could be separately set, I made the logfile option for the key also log_file. Yet, since there's no key specific config file, it shares master, one could only specify the log_file settings from the cli, it could not be hardcoded on the config file, unless, we made a separate config file just for key.
So, in order to reduce required changes, and keep it all as backwards compatible as possible, the key log file options is now, once again, `--key-logfile` which will allow us to hardcode it in the masters config file as `key_logfile`.
This will also, hopefully make travis behave better too.
