saving uncommitted changes in /etc prior to emerge run

systemd/system/distccd.service.d/00gentoo.conf

@@ -0,0 +1,6 @@
+# --allow is now mandatory as of distcc-2.18.
+# example:  --allow 192.168.0.0/24
+# example:  --allow 192.168.0.5 --allow 192.168.0.150
+
+[Service]
+Environment="ALLOWED_SERVERS=127.0.0.1"

systemd/system/hddtemp.service.d/00gentoo.conf

@@ -0,0 +1,3 @@
+# Set a list of drives to check
+[Service]
+Environment="HDDTEMP_DRIVES=/dev/sda /dev/sdb"

systemd/system/slapd.service.d/00gentoo.conf

@@ -0,0 +1,12 @@
+[Service]
+# Use the classical configuration file:
+#Environment="SLAPD_OPTIONS=-f /etc/openldap/slapd.conf"
+# Use the slapd configuration directory:
+#Environment="SLAPD_OPTIONS=-F /etc/openldap/slapd.d"
+
+Environment="SLAPD_URLS=ldaps:/// ldap:/// ldapi:///"
+# Other examples:
+#Environment="SLAPD_URLS=ldap://127.0.0.1/ ldap://10.0.0.1:1389/ cldap:///"
+
+# Specify the kerberos keytab file
+#Environment=KRB5_KTNAME=/etc/openldap/krb5-ldap.keytab

systemd/system/spamassassin.service.d/00gentoo.conf

@@ -0,0 +1,10 @@
+# Here you can append some options to spamd process, please
+# double check that you make needed changes in service file if
+# you use options requiring it
+# Some options:
+#
+# -c          to create a per user configuration file
+# -H [dir]    to switch home dirs for helper apps, dir optional
+
+[Service]
+Environment="SPAMD_OPTS= -c -H"