build(make): move nsproxy (Unix-only) into SUBDIRS_MODS to inherit core deps

nsproxy is now appended to SUBDIRS_MODS (under the existing Unix-only
guard) instead of to SUBDIRS. This makes it follow the same ordering
rules as the other modules (e.g., "modules after nsd"), avoiding races
where nsproxy could link before nsd finished—seen on GitHub runners
as intermittent collect2: error: ld returned 1 exit status while
building libnsproxy.so.

Author: gustafn

Makefile

@@ -19,6 +19,10 @@ include include/Makefile.global
 # Subdirectories
 SUBDIRS_CORE := nsthread nsd
 SUBDIRS_MODS := nssock nscgi nscp nslog nsperm nsdb nsssl quic revproxy nsdbtest
+# Unix only modules
+ifeq (,$(findstring MINGW,$(uname)))
+   SUBDIRS_MODS += nsproxy
+endif
 SUBDIRS      := $(SUBDIRS_CORE) $(SUBDIRS_MODS)
 
 #
@@ -39,11 +43,6 @@ else ifeq ($(strip $(USER_SET_J)$(HAS_JOBSERVER)),)
   endif
 endif
 
-# Unix only modules
-ifeq (,$(findstring MINGW,$(uname)))
-   SUBDIRS += nsproxy
-endif
-
 distfiles = $(SUBDIRS) doc tcl contrib include tests win win32 configure m4 \
 	Makefile autogen.sh install-sh missing aclocal.m4 configure.ac \
 	config.guess config.sub \