net-mgmt/zabbix2-server: Update from 2.0.17 to 2.0.18

• updated French translation; thanks to Zabbix translators
• enforced bash usage in mysql.size user parameter configuration script to avoid issues with different default shells; thanks to Timo Lindfors for reporting it
• fixed timeout being too low when sending configuration data to active proxy
• fixed loss of trailing whitespace in unquoted function parameters when creating calculated items with low level discovery

Also:

• Fix default path to PID
• Fix rc.d scripts to correct use PID file
• Remove IGNORE_WITH_MYSQL because referenced version was removed long ago

PR: 209890
Submitted by: pg@pakhom.spb.ru (maintainer)
Approved by: pi (mentor)