On production machine which most probably using php5-fpm + event or worker 
Apache2 MPM, this bug forcefully reinstall libapache2-mod-php5 after 
(unattended = minor) PHP5 update.
The direct effect of this is reinstalling mpm_prefork !

Simply stated: unattended-upgrades breaks LAMP installation by not resolving 
dependencies correctly.
Could maintainer have a look on this please?
I've been hit every time php5 package is updated.


Current workaround:
```
      Package: libapache2-mod-php5 libapache2-mod-php5filter
      Pin: origin ""
      Pin-Priority: -1
```
Note: may add php5-cgi, since the auto-installation of this package is not as 
disastrous.
Note: it's hard to *debug* this bug (unless setting XUUPOPT="-d" inside 
/etc/cron.daily/apt) and may well be left unnoticed in some case... until 
website traffic increases implying the prefork MPM extra-load.


Side question: why would unattended-upgrades provide its own (not-apt-based) 
resolution mechanism in the first place?


** Attachment added: "sample debug unattended-upgrade php5 log"
   
https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1434115/+attachment/4759001/+files/auto-upgrade.log

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https://bugs.launchpad.net/bugs/1434115

Title:
  apparently broken dependency resolution

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