Fix linking mythtv.cnf and systemd startup file

deb/debian/mythtv-backend.service

@@ -1,13 +1,13 @@
 [Unit]
 Description=MythTV Backend
 Documentation=https://www.mythtv.org/wiki/Mythbackend
-After=mysqld.service network-online.target
+After=mysqld.service network.target
  
 [Service]
 User=mythtv
 EnvironmentFile=-/etc/mythtv/additional.args
 ExecStartPre=/usr/bin/nm-online --quiet --timeout=5
-ExecStart=/usr/local/bin/mythbackend --quiet --syslog local7 $ADDITIONAL_ARGS
+ExecStart=/usr/bin/mythbackend --quiet --syslog local7 $ADDITIONAL_ARGS
 StartLimitBurst=10
 StartLimitInterval=10m
 Restart=on-failure

deb/debian/mythtv-database.postinst

@@ -60,8 +60,8 @@ case "$1" in
     fi
 
     ## This will need to exist until we no longer support 14.04
-    if ! [ -f "${NEWMYSQLCONFDIR}/mythtv.cnf"]; then
-      if [ -d "${NEWMYSQLCONFDIR}" ]; then
+    if [ -d "${NEWMYSQLCONFDIR}" ]; then
+      if ! [ -e "${NEWMYSQLCONFDIR}/mythtv.cnf"]; then
         ln -s "${MYSQLCONFIG}" "${NEWMYSQLCONFDIR}"
       fi
     fi