build fix for not glibc systems (shadow.h)

src/socket.c

@@ -47,9 +47,13 @@
 #include <signal.h>
 
 #if ENABLE_PAM
-#include <security/pam_appl.h>
+  #include <security/pam_appl.h>
 #else
-#include <shadow.h>
+  #ifdef _PWD_H_
+    #include <pwd.h>
+  #else
+    #include <shadow.h>
+  #endif /* PWD_H */
 #endif
 
 #include "screen.h"
@@ -1203,25 +1207,41 @@ static bool CheckPassword(const char *password) {
 static bool CheckPassword(const char *password) {
 	bool ret = false;
 	char *passwd = 0;
+
+#ifndef _PWD_H
+	struct passwd *p;
+#else
 	struct spwd *p;
+#endif
+
 	gid_t gid = getegid();
 	uid_t uid = geteuid();
 
 	if (seteuid(0) || setegid(0))
 		Panic(0, "\r\ncan't get root uid/gid\r\n");
+
+#ifndef _PWD_H
+	p = getpwnam_shadow(ppp->pw_name);
+#else
 	p = getspnam(ppp->pw_name);
+#endif
+	if (p == NULL)
+		return false;
+
 	if (seteuid(uid) || setegid(gid))
 		Panic(0, "\r\ncan't restore uid/gid\r\n");
 
 	if (p == NULL) {
 		AddStr("\r\ncan't open passwd file\r\n");
 		return false;
 	}
-
+#ifndef _PWD_H
+	passwd = crypt(password, p->pw_passwd);
+	ret    = (strcmp(passwd, p->pw_passwd) == 0);
+#else
 	passwd = crypt(password, p->sp_pwdp);
-
 	ret = (strcmp(passwd, p->sp_pwdp) == 0);
-
+#endif
 	return ret;
 }
 #endif /* ENABLE_PAM */