Add snmp and net-snmp support for macOS and Linux (#946)

Co-authored-by: Marc <m@pyc.ac>

config/ext.json

@@ -756,6 +756,18 @@
             "apcu"
         ]
     },
+    "snmp": {
+        "support": {
+            "Windows": "wip",
+            "BSD": "wip"
+        },
+        "type": "builtin",
+        "arg-type-unix": "with",
+        "arg-type-windows": "with",
+        "lib-depends": [
+            "net-snmp"
+        ]
+    },
     "soap": {
         "support": {
             "BSD": "wip"

config/lib.json

@@ -697,6 +697,17 @@
             "libncurses.a"
         ]
     },
+    "net-snmp": {
+        "source": "net-snmp",
+        "pkg-configs": [
+            "netsnmp",
+            "netsnmp-agent"
+        ],
+        "lib-depends": [
+            "openssl",
+            "zlib"
+        ]
+    },
     "nghttp2": {
         "source": "nghttp2",
         "static-libs-unix": [

config/source.json

@@ -820,6 +820,14 @@
             "path": "COPYING"
         }
     },
+    "net-snmp": {
+        "type": "ghtagtar",
+        "repo": "net-snmp/net-snmp",
+        "license": {
+            "type": "file",
+            "path": "COPYING"
+        }
+    },
     "nghttp2": {
         "type": "ghrel",
         "repo": "nghttp2/nghttp2",