For SLE 15 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Apache/SLE_15_SP4/Apache.repo
zypper refresh
zypper install perl-HTTP-DAV
For SLE 15 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Apache/SLE_15_SP3/Apache.repo
zypper refresh
zypper install perl-HTTP-DAV
For SLE 15 SP2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Apache/SLE_15_SP2/Apache.repo
zypper refresh
zypper install perl-HTTP-DAV
For SLE 15 SP1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Apache/SLE_15_SP1/Apache.repo
zypper refresh
zypper install perl-HTTP-DAV