[J65nko]

By using the "here" document construct of the shell will save you a lot of quoting or escaping

$ cat inline
#!/bin/sh

FILE=named.conf


cat <<END >${FILE}
zone $1 {
        type master;
        file "master/db.$1";
};
END

A sample run

$ sh inline xyz.com

$ cat named.conf
zone xyz.com {
        type master;
        file "master/db.xyz.com";
};

You even can redirect the output of a "here document" to a file

$ cat inline_redir
#!/bin/sh

FILE=$(mktemp)

echo ${FILE}
 
cat <<END > ${FILE} 
zone "$1" {
        type slave;
        file "sec/db.$1";
        masters { 72.26.x.x; };
};
END

$ sh inline_redir gorilla.com
/tmp/tmp.XwKYS14669

$ cat /tmp/tmp.XwKYS14669
zone "gorilla.com" {
        type slave;
        file "sec/db.gorilla.com";
        masters { 72.26.x.x; };
};

Now piping through ssh

$ cat ssh_append
#!/bin/sh

FILE=test.zone

ssh j65nko@parmenides "cat <<END > ${FILE} 
zone "$1" {
        type slave;
        file "sec/db.$1";
        masters { 72.26.x.x; };
};
END
"

$ sh ssh_append mickey_mouse.com

$ ssh j65nko@parmenides 'cat test.zone'
zone mickey_mouse.com {
        type slave;
        file sec/db.mickey_mouse.com;
        masters { 72.26.x.x; };
};

As you can see, the quotation marks are lost.
A fixed version

$ cat ssh_append                        
#!/bin/sh

FILE=test.zone

ssh j65nko@parmenides "cat <<END > ${FILE}
zone \"$1\" {
        type slave;
        file \"sec/db.$1\";
        masters { 72.26.x.x; };
};
END
"
$ sh ssh_append chimpansee.org 

$ ssh j65nko@parmenides 'cat test.zone' 
zone "chimpansee.org" {
        type slave;
        file "sec/db.chimpansee.org";
        masters { 72.26.x.x; };
};