Cosmetic change: s/THRLIBS/THREADLIBS/

Use a more intuitive variable name.

configure.ac

@@ -158,9 +158,9 @@ AC_SUBST(SOCKETLIBS)
 
 dnl Check for POSIX thread libraries
 AC_CHECK_HEADERS(pthread.h)
-AC_CHECK_LIB(pthread,pthread_create,THRLIBS="-lpthread",
-             AC_CHECK_LIB(pthread,pthread_create,THRLIBS="-lpthread -lrt",-lrt))
-AC_SUBST(THRLIBS)
+AC_CHECK_LIB(pthread,pthread_create,THREADLIBS="-lpthread",
+             AC_CHECK_LIB(pthread,pthread_create,THREADLIBS="-lpthread -lrt",-lrt))
+AC_SUBST(THREADLIBS)
 
 dnl
 dnl check for math-related functions needing -lm

plugins/Makefile.am

@@ -71,7 +71,7 @@ check_apt_LDADD = $(BASEOBJS)
 check_cluster_LDADD = $(BASEOBJS)
 check_dbi_LDADD = $(NETLIBS) $(DBILIBS)
 check_dig_LDADD = $(NETLIBS)
-check_disk_LDADD = $(BASEOBJS) $(THRLIBS)
+check_disk_LDADD = $(BASEOBJS) $(THREADLIBS)
 check_dns_LDADD = $(NETLIBS)
 check_dummy_LDADD = $(BASEOBJS)
 check_fping_LDADD = $(NETLIBS)