Log Message:
e2guardian: update to 5.5.6, fix PLIST and config path

Remove duplicates and sort PLIST
Remove ssl option as no longer supported
Fix path to read config files from

Changes since 5.5.5:
    Add addECHtoFlags option for monitoring purposes
    Rewrite of SNI extraction code and addition of checkme.hasECH variable
    Fix for #810 - intermitant garbled SNI extraction with THTTPS
    Fix #816 - unused variable in trickle.cpp
    Fix #817 RegExp::match() issue
    Fix #819 ICAP send time-out but does not close connection
    Impliment #818 multiple domains/ips in tlsproxycn
    Update expire artifacts ttl
    Update armdebian.yml
    Update debianlatest.yml
    Update ubuntujammy.yml
    Fix #815 - Change to invoke pthreads_sigmask before creating any threads to
    fix occational issue of logging stopping
    Fix #814 adjustments for LibreSSL and bug fix DEBUG_debug call.
    Add -funsigned-char to CXXFLAGS to ensure char is unsigned
       If this is not set causes stack and other issues in some platforms.
    More robust regular expressions in bannedregexpurl list