This readme serves to remind me of some new things that I saw this
year when DigiCert took over GeoTrust to become my new certificate
provider.

The file that I got issued was a PEM file, which is evidently 
interchangeable with the CRT.

So, I just did these to set it up:

cp -a /home/scdemarc/www/ssl_cert/rapidssl/2020_12_09/carolinacustom.pem /usr/local/apache/conf/ssl.crt/carolinacustom.crt
cp -a /home/scdemarc/www/ssl_cert/rapidssl/2020_12_09/carolinacustom.key /usr/local/apache/conf/ssl.key/carolinacustom.key

and then restarted Apache with these commands (issued as root):

> w astart
cd /usr/local/apache/httpd-2.2.34/support; ./apachectl -D SSL -f /etc/httpd/conf/httpd.conf -k start

> w astop
cd /usr/local/apache/httpd-2.2.34/support; ./apachectl -D SSL -f /etc/httpd/conf/httpd.conf -k stop