Various dlopen/linking cleanups from #42100 (#42166)

- **bpf-util: rename from bpf-dlopen, unify version-specific symbol
handling**
- **cryptsetup: dlopen libcryptsetup in tokens**
- **tree-wide: dlopen libpam in pam plugins**
- **test-bus-marshal: dlopen() glib and libdbus instead of linking
directly**
- **lock-util: Simplify timeout for lock_generic_with_timeout()**
- **color-util: simplify hsv_to_rgb, fix rgb_to_hsv negative-hue wrap**
- **tree-wide: Use our own macros instead of fabs()/fmax()/fmin()**
- **locale-util: dlopen() libintl instead of linking against it**
- **home: Use log2u64() over log2()**
- **meson: drop libdl, threads, and librt dependencies**
- **libc: Use dlsym() from a constructor instead of weak symbols**
- **libc: Make sure C23 versions of strtol(), sscanf() are not used**

src/network/meson.build

@@ -188,7 +188,6 @@ network_fuzz_template = fuzz_template + {
                 libsystemd_network,
         ],
         'objects' : ['systemd-networkd'],
-        'dependencies' : threads,
         'include_directories' : network_includes,
 }
 
@@ -204,7 +203,6 @@ executables += [
                         libsystemd_network,
                         networkd_link_with,
                 ],
-                'dependencies' : threads,
                 'bpf_programs': [
                         'sysctl-monitor',
                 ]
@@ -240,11 +238,9 @@ executables += [
         },
         network_test_template + {
                 'sources' : files('test-network-tables.c'),
-                'dependencies' : threads,
         },
         network_test_template + {
                 'sources' : files('test-network.c'),
-                'dependencies' : threads,
         },
         network_test_template + {
                 'sources' : files('test-networkd-address.c'),

src/network/networkd-sysctl.c

@@ -5,7 +5,7 @@
 #include "sd-messages.h"
 
 #include "af-list.h"
-#include "bpf-dlopen.h"
+#include "bpf-util.h"
 #include "conf-parser.h"
 #include "alloc-util.h"
 #include "cgroup-util.h"