install: Rename generate-self-signed-cert.

This script generates one certificate.

docs/THIRDPARTY

@@ -68,7 +68,7 @@ Files: puppet/zulip_internal/files/zulip-ec2-configure-interfaces
 Copyright: 2013-2017, Dropbox, Inc., Kandra Labs, Inc., and contributors
 License: Expat
 
-Files: scripts/setup/generate-self-signed-certs
+Files: scripts/setup/generate-self-signed-cert
 Copyright: 2003-2006 Thom May
            2006 Fabio M. Di Nitto
            2006 Adam Conrad

docs/production/ssl-certificates.md

@@ -94,7 +94,7 @@ logged in as root, use `sudo -i` to start an interactive root shell.
 The quickest way to create a cert is to use the script we provide:
 
 ```
-scripts/setup/generate-self-signed-certs zulip.example.com
+scripts/setup/generate-self-signed-cert zulip.example.com
 ```
 
 from the root of your Zulip directory (replacing `zulip.example.com`

scripts/lib/docker-functions.sh

@@ -130,7 +130,7 @@ configure_nginx() {
 configure_certs() {
     echo "Executing certificates configuration..."
     if [ ! -f "$DATA_DIR/certs/zulip.key" ] && [ ! -f "$DATA_DIR/certs/zulip.combined-chain.crt" ]; then
-        /root/zulip/scripts/setup/generate-self-signed-certs "$ZULIP_USER_DOMAIN"
+        /root/zulip/scripts/setup/generate-self-signed-cert "$ZULIP_USER_DOMAIN"
         mv /etc/ssl/private/zulip.key "$DATA_DIR/certs/zulip.key"
         mv /etc/ssl/certs/zulip.combined-chain.crt "$DATA_DIR/certs/zulip.combined-chain.crt"
     fi