Some fixes and multiple gearmand server support

[dhoffend]

Fixes:

• If the gearmand server goes away (stop) and comes back online (start) the gearman_client doesn't crash. It doesn't segfault but it stops sending stuff to the queues
• This version recreates the gearman_client if an error occurs
• The logswitch method didn't logged anything when using naemon >= 1.0.5

Changes:

• the logswitch method accepts multiple arguments for sprintf like logging
• add_servers is now used instead of add_server: this way you can have failover gearmand server (comma seperated, not really useful but it works), but change the server port very easily
• the gearman_server_addr option has been renamed to gearman_server (the old will continue to work)
• the gearman_server option accepts multiple gearmand server (semicolon seperated) where the job needs to be duplicated. This very useful for satellite systems that report to multiple phpNSTA masters
• connection errors to gearmand won't spam the naemon.log anymore. connection errors are repeated every minute

Example: Change default server:

gearman_server=localhost:4731

Example: Send duplicates to 2 gearmand:

gearman_server=localhost:4730;localhost:4731

Example: have a failover gearmand:

gearman_server=localhost:4731,localhost:4730

This also works combined (whatever):

gearman_server=localhost:4731,localhost:4730;localhost:4733,localhost:4732

[nook24]

Hi @dhoffend, cool to see you again!

I will take a closer look to this in the next few days but looks good so far. Do you also want to send the PR against the new repository https://github.com/statusengine/module ?

If I port it, you're not the contributor, I want to avoid this.

[dhoffend]

Yeah. I realized it later that you moved the broker to a separate repo. I’ll take care of it in the next days

[dhoffend]

I guess I'll update this (backport) pull request once the patches arrive in the statusengine/module repo.

[nook24]

Pull Request was created by @dhoffend in the new repository: https://github.com/statusengine/module/pull/1