Stopped Unix plugin loader from throwing #4661

Tested on Mac OS X only

plugin-unix.diff

@@ -0,0 +1,15 @@
+diff --git a/src/lib/arch/unix/ArchPluginUnix.cpp b/src/lib/arch/unix/ArchPluginUnix.cpp
+index 997c274..3e390f0 100644
+--- a/src/lib/arch/unix/ArchPluginUnix.cpp
++++ b/src/lib/arch/unix/ArchPluginUnix.cpp
+@@ -76,8 +76,8 @@ ArchPluginUnix::load()
+ 		void* library = dlopen(path.c_str(), RTLD_LAZY);
+ 
+ 		if (library == NULL) {
+-			LOG((CLOG_ERR "failed to load plugin: %s", (*it).c_str()));
+-			throw XArch(dlerror());
++			LOG((CLOG_ERR "failed to load plugin '%s', error: %s", (*it).c_str(), dlerror()));
++			continue;
+ 		}
+ 
+ 		String filename = synergy::string::removeFileExt(*it);