Use better defaults for installation locations

These defaults assume the installation will be system wide either on
/usr or /usr/local prefix. If the user wants to separate the
installation completely from their system SYSCONFDIR, LOCALSTATEDIR,
GSAD_PID_DIR, GVM_RUN_DIR and SYSTEMD_SERVICE_DIR need to be adjusted.

gsad/CMakeLists.txt

@@ -61,7 +61,7 @@ else (CLANG_FORMAT)
 endif (CLANG_FORMAT)
 
 if (NOT SYSCONFDIR)
-  set (SYSCONFDIR "${CMAKE_INSTALL_PREFIX}/etc")
+  set (SYSCONFDIR "/etc")
 endif (NOT SYSCONFDIR)
 
 if (NOT EXEC_PREFIX)
@@ -81,7 +81,7 @@ if (NOT LIBDIR)
 endif (NOT LIBDIR)
 
 if (NOT LOCALSTATEDIR)
-  set (LOCALSTATEDIR "${CMAKE_INSTALL_PREFIX}/var")
+  set (LOCALSTATEDIR "/var")
 endif (NOT LOCALSTATEDIR)
 
 if (NOT INCLUDEDIR)
@@ -96,11 +96,11 @@ set (GSAD_DATA_DIR "${DATADIR}/gvm/gsad")
 set (GSAD_CONFIG_DIR "${SYSCONFDIR}/gvm/")
 
 if (NOT GSAD_PID_DIR)
-  set (GSAD_PID_DIR "${LOCALSTATEDIR}/run")
+  set (GSAD_PID_DIR "/run")
 endif (NOT GSAD_PID_DIR)
 
 if (NOT GVM_RUN_DIR)
-  set (GVM_RUN_DIR  "${LOCALSTATEDIR}/run")
+  set (GVM_RUN_DIR  "/run")
 endif (NOT GVM_RUN_DIR)
 
 if (NOT GVM_STATE_DIR)

gsad/config/CMakeLists.txt

@@ -17,15 +17,15 @@
 
 
 if (NOT SYSTEMD_SERVICE_DIR)
-  set (SYSTEMD_SERVICE_DIR "${CMAKE_INSTALL_PREFIX}/lib/systemd/system")
+  set (SYSTEMD_SERVICE_DIR "/lib/systemd/system")
 endif (NOT SYSTEMD_SERVICE_DIR)
 
 if (NOT DEFAULT_CONFIG_DIR)
-  set (DEFAULT_CONFIG_DIR "${CMAKE_INSTALL_PREFIX}/etc/default")
+  set (DEFAULT_CONFIG_DIR "${SYSCONFDIR}/default")
 endif (NOT DEFAULT_CONFIG_DIR)
 
 if (NOT LOGROTATE_DIR)
-  set (LOGROTATE_DIR "${CMAKE_INSTALL_PREFIX}/etc/logrotate.d")
+  set (LOGROTATE_DIR "${SYSCONFDIR}/logrotate.d")
 endif (NOT LOGROTATE_DIR)
 
 configure_file (gsad.service.in gsad.service)