Plugins: Add imap,simap,pop,spop CheckCommand objects.

Refs #6225

Signed-off-by: Michael Friedrich <michael.friedrich@gmail.com>

doc/6-configuring-icinga-2.md

@@ -1839,6 +1839,48 @@ Name            | Description
 ssmtp_address   | **Required.** The host's address. Defaults to "$address$".
 ssmtp_port      | **Optional.** The port that should be checked. Defaults to 465.
 
+#### <a id="plugin-check-command-imap"></a> imap
+
+Check command object for the `check_imap` plugin.
+
+Custom Attributes:
+
+Name            | Description
+----------------|--------------
+imap_address    | **Optional.** The host's address. Defaults to "$address$".
+
+#### <a id="plugin-check-command-simap"></a> simap
+
+Check command object for the `check_simap` plugin.
+
+Custom Attributes:
+
+Name            | Description
+----------------|--------------
+simap_address   | **Optional.** The host's address. Defaults to "$address$".
+simap_port      | **Optional.** The host's port.
+
+#### <a id="plugin-check-command-pop"></a> pop
+
+Check command object for the `check_pop` plugin.
+
+Custom Attributes:
+
+Name            | Description
+----------------|--------------
+pop_address     | **Optional.** The host's address. Defaults to "$address$".
+
+#### <a id="plugin-check-command-spop"></a> spop 
+
+Check command object for the `check_spop` plugin.
+
+Custom Attributes:
+
+Name            | Description
+----------------|--------------
+spop_address    | **Optional.** The host's address. Defaults to "$address$".
+spop_port       | **Optional.** The host's port.
+
 #### <a id="plugin-check-command-ntp-time"></a> ntp_time
 
 Check command object for the `check_ntp_time` plugin.

itl/command-plugins.conf

@@ -154,6 +154,56 @@ object CheckCommand "ssmtp" {
 	vars.ssmtp_address = "$address$"
 }
 
+object CheckCommand "imap" {
+  	import "plugin-check-command"
+
+  	command = PluginDir + "/check_imap"
+
+	arguments = {
+		"-H" = "$imap_address$"
+	}
+
+  	vars.imap_address = "$address$"
+}
+
+object CheckCommand "simap" {
+  	import "plugin-check-command"
+
+	  command = PluginDir + "/check_simap"
+
+	arguments = {
+		"-H" = "$simap_address$"
+		"-p" = "$simap_port$"
+	}
+
+	vars.simap_address = "$address$"
+}
+
+object CheckCommand "pop" {
+	import "plugin-check-command"
+
+  	command = PluginDir + "/check_pop"
+
+	arguments = {
+		"-H" = "$pop_address$"
+	}
+
+	vars.pop_address = "$address$"
+}
+
+object CheckCommand "spop" {
+  	import "plugin-check-command"
+
+	command = PluginDir + "/check_spop"
+
+	arguments = {
+		"-H" = "$spop_address$"
+		"-p" = "$spop_port$"
+	}
+
+	vars.spop_address = "$address$"
+}
+
 object CheckCommand "ntp_time" {
 	import "plugin-check-command"