Fix static builds for Ubuntu 22.04

Link libbsd, libmd, libprotokit for ZMQ to fix static builds for Ubuntu 22.04

CMakeLists.txt

@@ -1178,6 +1178,9 @@ find_library(NORM_LIBRARY norm)
 find_library(GSSAPI_LIBRARY gssapi_krb5)
 find_library(PROTOLIB_LIBRARY protolib)
 find_library(SODIUM_LIBRARY sodium)
+find_library(BSD_LIBRARY bsd)
+find_library(MD_LIBRARY md)
+find_library(PROTOKIT_LIBRARY protokit)
 
 if(NOT ZMQ_INCLUDE_PATH)
   message(FATAL_ERROR "Could not find required header zmq.h")
@@ -1200,6 +1203,15 @@ endif()
 if(SODIUM_LIBRARY)
   set(ZMQ_LIB "${ZMQ_LIB};${SODIUM_LIBRARY}")
 endif()
+if(BSD_LIBRARY)
+  set(ZMQ_LIB "${ZMQ_LIB};${BSD_LIBRARY}")
+endif()
+if(MD_LIBRARY)
+  set(ZMQ_LIB "${ZMQ_LIB};${MD_LIBRARY}")
+endif()
+if(PROTOKIT_LIBRARY)
+  set(ZMQ_LIB "${ZMQ_LIB};${PROTOKIT_LIBRARY}")
+endif()
 
 include(external/supercop/functions.cmake) # place after setting flags and before src directory inclusion
 add_subdirectory(contrib)