Move the monit scripts to /usr and re-instate with symlinks in postinst

This is a model commit to show how to move the "hard-coded" monit
scripts into /usr and replace them back into /etc/symbiosis/monit.d with
symlinks.

email/debian/install

 exim4/                     etc/
 dovecot/                   etc/
 sbin/                      usr/
-symbiosis/                 etc/
+symbiosis/firewall         etc/symbiosis
+symbiosis/test.d           etc/symbiosis
+symbiosis/monit.d/*        usr/share/symbiosis/monit/checks/

email/debian/maintscript

@@ -6,3 +6,8 @@ rm_conffile /etc/symbiosis/monit.d/clamav-freshclam 2014:1231
 rm_conffile /etc/symbiosis/test.d/exim4_acl_tests/testy 2010:0101
 rm_conffile /etc/symbiosis/test.d/exim4_acl_tests/test2 2010:0101
 rm_conffile /etc/symbiosis/test.d/exim4_acl_tests/test3 2010:0101
+rm_conffile /etc/symbiosis/monit.d/spamassassin 2016:0101
+rm_conffile /etc/symbiosis/monit.d/exim4 2016:0101
+rm_conffile /etc/symbiosis/monit.d/dovecot 2016:0101
+rm_conffile /etc/symbiosis/monit.d/clamav-freshclam 2016:0101
+rm_conffile /etc/symbiosis/monit.d/clamav-daemon 2016:0101

email/debian/postinst

@@ -136,12 +136,26 @@ if [ -e /etc/dovecot/Makefile ] ; then
     cd /etc/dovecot && make dovecot.conf
 fi
 
+monit_dir="/etc/symbiosis/monit.d"
+mkdir -p "$monit_dir"
+
 #
 #  Restart all deamons
 #
 for i in exim4 dovecot spamassassin clamav-daemon symbiosis-email-dict-proxy symbiosis-email-poppassd; do
     # spamassassin + clamav-daemon might not be installed.  Wrap the invokation.
     service $i restart || true
+
+    #
+    # Add symlinks for our symbiosis monit scripts (one per service, possibly)
+    #
+    monit_script="/usr/share/symbiosis/monit/checks/$i"
+    link_target="$monit_dir/$i"
+
+    if [ -x "$monit_script" ] && [ ! -e "$link_target" ] ; then
+      echo "I: Adding symlink for Symbiosis Monit script for $i"
+      ln -s "$monit_script" "$link_target" || true
+    fi
 done
 
 #DEBHELPER#