Add dhcp-events.rules to Makefile.am so it gets installed.
Also order the rule files alphabetically for easier review.
ruledir = $(datadir)/suricata/rules
dist_rule_DATA = \
+app-layer-events.rules \
decoder-events.rules \
-stream-events.rules \
-smtp-events.rules \
-http-events.rules \
+dhcp-events.rules \
+dnp3-events.rules \
dns-events.rules \
-tls-events.rules \
-modbus-events.rules \
-app-layer-events.rules \
files.rules \
-dnp3-events.rules \
-ntp-events.rules \
+http-events.rules \
+ipsec-events.rules \
+kerberos-events.rules \
+modbus-events.rules \
nfs-events.rules \
+ntp-events.rules \
smb-events.rules \
-ipsec-events.rules \
-kerberos-events.rules
+smtp-events.rules \
+stream-events.rules \
+tls-events.rules