Speed Pack - Static Cache, WEBP, SQL profiler and more 11.1.9

Page Cache: Improve the purge
Page Cache: Optimize the table jm_pagecache_mods (less datas)

Page Cache: The cache is now stored in /var/cache directory for PS1.7 to avoid it to be cleared each time a module is enabled/disabled
WEBP: Fix a bug with some HTTPS shops and option 'Force .webp extension'

• Page Cache: Fix a bug in the copy of settings to different shops (for multishop feature)
  Page Cache: Improve hasImpactForUserGroupAsDefault() so backoffice modifications are much less slowed down

fix bug

• Page Cache: Improve the efficiency of the Cache-Warmer
• Page Cache: Add a form to copy current shop configuration to other shops (for multistore)
• WEBP: upgrade rosell-dk library from 2.3.0 to 2.6.0
• Page Cache: Fix a wrong country detection for visitors