fix: advanced_status.sh: need command to check for command presence

Refs: IN-821

chore: advanced_status.sh: use absolute path for carbonio-call

chore: statuslog.pl: removal

Refs: IN-814

fix: configd.py: use socket.AF_INET for IPv4 checks

Refs: IN-796

chore: carbonio: remove unneeded shutil call

Refs: IN-767

fix: carbonio-stats.service: handle systemd enablement in ctl script

Refs: IN-700

chore: ldapinit: transform to perl module for setup.pl

chore: milterctl: remove kill -0, uneffective command

fix: pid file path for ldap scripts (#88)

chore: certmgr: make verifycrt work for non-RSA (ECDSA) certs

Achieved by comparing pubkey (generic) instead of modulus (RSA specific).