Add 'emailonly' client to send status emails without needing a DDNS host

This adds a protocol to send status updates without needing a Dynamic
DNS host. This is useful if you don't have a DDNS host but want to be
updated when the IP of a machine changes. Because of how ddclient is
written, it requires setting a host name, but doesn't actually do
anything with it. Let me know if there's a better way to handle this.

ddclient.conf.in

@@ -88,7 +88,6 @@ ssl=yes					# use ssl-support.  Works with
 # protocol=dyndns2			\
 # your-static-host.dyndns.org
 
-##
 ##
 ## dyndns.org custom addresses
 ##
@@ -130,8 +129,8 @@ ssl=yes					# use ssl-support.  Works with
 ## OrgDNS.org account-configuration
 ##
 # use=web, web=members.orgdns.org/nic/ip
+# protocol=dyndns2
 # server=www.orgdns.org 		\
-# protocol=dyndns2 			\
 # login=yourLoginName 			\
 # password=yourPassword 		\
 # yourSubdomain.orgdns.org
@@ -141,9 +140,9 @@ ssl=yes					# use ssl-support.  Works with
 ##
 # protocol=namecheap,                     \
 # server=dynamicdns.park-your-domain.com,	\
-# login=my-namecheap.com-login,			\
+# login=example.com,                      \
-# password=my-namecheap.com-password		\
+# password=example.com-password           \
-# fully.qualified.host
+# subdomain.example.com
 
 ##
 ## NearlyFreeSpeech.NET (nearlyfreespeech.net)
@@ -154,12 +153,10 @@ ssl=yes					# use ssl-support.  Works with
 # zone=example.com                      \
 # example.com,subdomain.example.com
 
-##
 ##
 ## Loopia (loopia.se)
 ##
-# use=web
+# use=web, web=loopia
-# web=loopia
 # protocol=dyndns2
 # server=dns.loopia.se
 # script=/XDynDNSServer/XDynDNS.php
@@ -192,7 +189,7 @@ ssl=yes					# use ssl-support.  Works with
 #protocol=cloudflare,        \
 #zone=domain.tld,            \
 #ttl=1,                      \
-#login=your-login-email,     \ # Only needed if you are using your global API key. If you are using an API token, set it to "token" (wihtout double quotes).
+#login=your-login-email,     \ # Only needed if you are using your global API key. If you are using an API token, set it to "token" (without double quotes).
 #password=APIKey             \ # This is either your global API key, or an API token. If you are using an API token, it must have the permissions "Zone - DNS - Edit" and "Zone - Zone - Read". The Zone resources must be "Include - All zones".
 #domain.tld,my.domain.tld
 
@@ -200,12 +197,23 @@ ssl=yes					# use ssl-support.  Works with
 ## Gandi (gandi.net)
 ##
 ## Single host update
-# protocol=gandi,                      \
+# protocol=gandi
-# zone=example.com,                    \
+# zone=example.com
-# password=my-gandi-api-key,           \
+# password=my-gandi-access-token
-# ttl=3h                               \
+# use-personal-access-token=yes
+# ttl=10800 # optional
 # myhost.example.com
 
+##
+## GoDaddy (godaddy.com)
+##
+# protocol=godaddy,                    \
+# password=my-godaddy-api-key,         \
+# password=my-godaddy-secret,          \
+# ttl=600                              \
+# zone=example.com,                    \
+# myhost.example.com,nexthost.example.com
+
 ##
 ## Google Domains (www.google.com/domains)
 ##
@@ -233,12 +241,12 @@ ssl=yes					# use ssl-support.  Works with
 ##
 ## MyOnlinePortal (http://myonlineportal.net)
 ##
-# protocol=dyndns2
-# ssl=yes
 # # ipv6=yes # optional
 # use=web, web=myonlineportal.net/checkip
 # # use=if, if=eth0     # alternative to use=web
 # # if-skip=Scope:Link  # alternative to use=web
+# protocol=dyndns2
+# ssl=yes
 # login=your-myonlineportal-username
 # password=your-myonlineportal-password
 # domain.myonlineportal.net
@@ -246,8 +254,8 @@ ssl=yes					# use ssl-support.  Works with
 ##
 ## nsupdate.info IPV4(https://www.nsupdate.info)
 ##
-#protocol=dyndns2
 #use=web, web=http://ipv4.nsupdate.info/myip
+#protocol=dyndns2
 #server=ipv4.nsupdate.info
 #login=domain.nsupdate.info
 #password='123'
@@ -257,8 +265,8 @@ ssl=yes					# use ssl-support.  Works with
 ## nsupdate.info IPV6 (https://www.nsupdate.info)
 ## ddclient releases <= 3.8.1 do not support IPv6
 ##
-#protocol=dyndns2
 #usev6=if, if=eth0
+#protocol=dyndns2
 #server=ipv6.nsupdate.info
 #login=domain.nsupdate.info
 #password='123'
@@ -288,6 +296,16 @@ ssl=yes					# use ssl-support.  Works with
 # password=your_password
 # test.example.com
 
+##
+## Porkbun (https://porkbun.com/)
+##
+# protocol=porkbun
+# apikey=APIKey
+# secretapikey=SecretAPIKey
+# root-domain=example.com
+# host.example.com,host2.sub.example.com
+# example.com,sub.example.com
+
 ##
 ## ClouDNS (https://www.cloudns.net)
 ##
@@ -303,9 +321,79 @@ ssl=yes					# use ssl-support.  Works with
 # password=mypassword   \
 # myhost.mydomain.com
 
+##
 ## dnsexit (www.dnsexit.com)
 ##
 #protocol=dnsexit,                                            \
 #login=myusername,                                            \
 #password=mypassword,                                         \
 #subdomain-1.domain.com,subdomain-2.domain.com
+
+##
+## dnsexit2 (API method www.dnsexit.com)
+##
+#protocol=dnsexit2
+#password=MyAPIKey
+#subdomain-1.domain.com,subdomain-2.domain.com
+
+##
+## domeneshop (www.domeneshop.no)
+##
+# protocol=domeneshop
+# login=<token>
+# password=<secret>
+# subdomain-1.domain.com,subdomain-2.domain.com
+
+##
+## Njal.la (http://njal.la/)
+##
+# protocol=njalla,
+# password=mypassword
+# quietreply=no|yes
+# my-domain.com
+
+##
+## regfish.de (www.regfish.de/)
+##
+# protocol=regfishde,
+# password=mypassword
+# my-domain.com
+
+##
+## Enom (www.enom.com)
+##
+# protocol=enom,
+# login=domain.name,
+# password=domain-password
+# my-domain.com
+
+##
+## DigitalOcean (www.digitalocean.com)
+##
+#protocol=digitalocean, \
+#zone=example.com,      \
+#password=api-token     \
+#example.com,sub.example.com
+
+##
+## Infomaniak (www.infomaniak.com)
+##
+# protocol=infomaniak,
+# login=ddns_username,
+# password=ddns_password
+# example.com
+#
+# N.B. the infomaniak protocol is obsolete. Please use dyndns2 instead:
+#
+# protocol=dyndns2,
+# use=web, web=infomaniak.com/ip.php/
+# login=ddns_username,
+# password=ddns_password
+# redirect=2
+# example.com
+
+##
+## Email Only
+##
+# protocol=emailonly
+# noop