modules: minimum match for revision control

(cherry picked from commit 9f78fd0)

Author: razvancrainea

sr_module.c

@@ -206,6 +206,7 @@ static inline int version_control(const struct module_exports* exp, char *path)
 {
 	const char *hint = "(try `make clean all modules' and reinstall everything)";
 	const char *scm_nm = "version control system";
+	int len;
 	if ( !exp->ver_info.version ) {
 		LM_CRIT("BUG - version not defined in module <%s>\n", path );
 		return 0;
@@ -242,7 +243,9 @@ static inline int version_control(const struct module_exports* exp, char *path)
 			core_scm_ver.type, exp->ver_info.scm.type, hint);
 		return 0;
 	}
-	if (strcmp(core_scm_ver.rev, exp->ver_info.scm.rev) != 0) {
+	len = (strlen(core_scm_ver.rev) < strlen(exp->ver_info.scm.rev))?
+		strlen(core_scm_ver.rev): strlen(exp->ver_info.scm.rev);
+	if (strncmp(core_scm_ver.rev, exp->ver_info.scm.rev, len) != 0) {
 		LM_CRIT("module %s revision mismatch for %s "
 			" \ncore: %s \nmodule: %s %s\n", scm_nm, exp->name,
 			core_scm_ver.rev, exp->ver_info.scm.rev, hint);