[dlopen] move all dlopen lib names at the top of the respective files

makes it easier to figure out library supported version

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>

libknet/compress_bzip2.c

@@ -20,6 +20,8 @@
 #include "logging.h"
 #include "common.h"
 
+#define LIBBZ2_1 "libbz2.so.1"
+
 /*
  * global vars for dlopen
  */
@@ -69,7 +71,7 @@ int bzip2_load_lib(
 	int err = 0, savederrno = 0;
 
 	if (!bzip2_lib) {
-		bzip2_lib = open_lib(knet_h, "libbz2.so.1", 0);
+		bzip2_lib = open_lib(knet_h, LIBBZ2_1, 0);
 		if (!bzip2_lib) {
 			savederrno = errno;
 			err = -1;

libknet/compress_lz4.c

@@ -20,6 +20,8 @@
 #include "logging.h"
 #include "common.h"
 
+#define LIBLZ4_1 "liblz4.so.1"
+
 /*
  * global vars for dlopen
  */
@@ -82,7 +84,7 @@ int lz4_load_lib(
 	int err = 0, savederrno = 0;
 
 	if (!lz4_lib) {
-		lz4_lib = open_lib(knet_h, "liblz4.so.1", 0);
+		lz4_lib = open_lib(knet_h, LIBLZ4_1, 0);
 		if (!lz4_lib) {
 			savederrno = EAGAIN;
 			err = -1;
@@ -117,7 +119,7 @@ int lz4_val_level(
 	int compress_level)
 {
 	if (compress_level <= 0) {
-		log_info(knet_h, KNET_SUB_LZ4COMP, "lz4 acceleration level 0 (or negatives) are automatically remapped to 1 by liblz4");
+		log_info(knet_h, KNET_SUB_LZ4COMP, "lz4 acceleration level 0 (or negatives) are automatically remapped to 1 by %s", LIBLZ4_1);
 	}
 
 	return 0;

libknet/compress_lzma.c

@@ -20,6 +20,8 @@
 #include "logging.h"
 #include "common.h"
 
+#define LIBLZMA_5 "liblzma.so.5"
+
 /*
  * global vars for dlopen
  */
@@ -72,7 +74,7 @@ int lzma_load_lib(
 	int err = 0, savederrno = 0;
 
 	if (!lzma_lib) {
-		lzma_lib = open_lib(knet_h, "liblzma.so.5", 0);
+		lzma_lib = open_lib(knet_h, LIBLZMA_5, 0);
 		if (!lzma_lib) {
 			savederrno = EAGAIN;
 			err = -1;

libknet/compress_lzo2.c

@@ -20,6 +20,8 @@
 #include "logging.h"
 #include "common.h"
 
+#define LIBLZO2_2 "liblzo2.so.2"
+
 /*
  * global vars for dlopen
  */
@@ -120,7 +122,7 @@ int lzo2_load_lib(
 	int err = 0, savederrno = 0;
 
 	if (!lzo2_lib) {
-		lzo2_lib = open_lib(knet_h, "liblzo2.so.2", 0);
+		lzo2_lib = open_lib(knet_h, LIBLZO2_2, 0);
 		if (!lzo2_lib) {
 			savederrno = EAGAIN;
 			err = -1;

libknet/compress_zlib.c

@@ -20,6 +20,8 @@
 #include "logging.h"
 #include "common.h"
 
+#define LIBZ_1 "libz.so.1"
+
 /*
  * global vars for dlopen
  */
@@ -70,7 +72,7 @@ int zlib_load_lib(
 	int err = 0, savederrno = 0;
 
 	if (!zlib_lib) {
-		zlib_lib = open_lib(knet_h, "libz.so.1", 0);
+		zlib_lib = open_lib(knet_h, LIBZ_1, 0);
 		if (!zlib_lib) {
 			savederrno = EAGAIN;
 			err = -1;

libknet/crypto_nss.c

@@ -27,6 +27,8 @@
 #include "crypto_nss.h"
 #include "logging.h"
 
+#define LIBNSS3 "libnss3.so"
+
 /*
  * global vars for dlopen
  */
@@ -344,7 +346,7 @@ static int init_nss_db(knet_handle_t knet_h)
 void nsscrypto_unload_lib(
 	knet_handle_t knet_h)
 {
-	log_warn(knet_h, KNET_SUB_NSSCRYPTO, "libnss runtime unload can cause minor (< 2kb) memory leaks! Please reload your application at a convenient time (and no, we cannot detect if you are shutting down the app or closing one handle, so you will get this message regardless).");
+	log_warn(knet_h, KNET_SUB_NSSCRYPTO, "%s runtime unload can cause minor (< 2kb) memory leaks! Please reload your application at a convenient time (and no, we cannot detect if you are shutting down the app or closing one handle, so you will get this message regardless).", LIBNSS3);
 	if (nss_lib) {
 		(*_int_NSS_Shutdown)();
 		if ((*_int_PR_Initialized)()) {
@@ -363,7 +365,7 @@ int nsscrypto_load_lib(
 	int err = 0, savederrno = 0;
 
 	if (!nss_lib) {
-		nss_lib = open_lib(knet_h, "libnss3.so", 0);
+		nss_lib = open_lib(knet_h, LIBNSS3, 0);
 		if (!nss_lib) {
 			savederrno = errno;
 			err = -1;