bashrc: Add function dig-reverse

.config/bashrc.d/10_common.sh

@@ -112,6 +112,11 @@ function b64dec() {
 alias digs='dig +short'
 alias digrr='dig +noall +answer'
 
+# Resolve a hostname to its IP and back to a hostname via reverse DNS
+function dig-reverse() {
+    dig +short -x $(dig +short $@)
+}
+
 # Print all information in lsblk in JSON for better readability
 alias lsblkjson='lsblk -O --json'