Add php-pecl-redis6 to the PHP workload.

[notroj]

No description provided.

[yselkowitz]

@notroj it looks like this will result in the addition of liblzf, php-pecl-igbinary, and php-pecl-msgpack (although the last two are already conditionalized and could be disabled if unwanted) as dependencies. Could you please confirm what the plans are for those?

Also, do you want to alphabetize this (at least within the php-pecl-* group), and take the opportunity to clean up the duplicate php-pear and php-pecl-zip too?

[notroj]

We're going to flip the bconds to default-off for RHEL

[notroj]

Also, do you want to alphabetize this (at least within the php-pecl-* group), and take the opportunity to clean up the duplicate php-pear and php-pecl-zip too?

Thanks hadn't spotted it - I will be updating #1315 to move these components to a new SST, I'll do it then.

[yselkowitz]

And liblzf will end up added, or are you going to use the bundled version for RHEL/ELN?