all: fix minor typos

[thaller@redhat.com: original patch by Yuri, extracted from [1]]

[1] https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/565

src/basic/process-util.c

@@ -1334,7 +1334,7 @@ int safe_fork_full(
 
                 ppid = getppid();
                 if (ppid == 0)
-                        /* Parent is in a differn't PID namespace. */;
+                        /* Parent is in a different PID namespace. */;
                 else if (ppid != original_pid) {
                         log_debug("Parent died early, raising SIGTERM.");
                         (void) raise(SIGTERM);

src/basic/random-util.c

@@ -77,7 +77,7 @@ int rdrand(unsigned long *ret) {
          *           hash functions for its hash tables, with a seed generated randomly. The hash tables
          *           systemd employs watch the fill level closely and reseed if necessary. This allows use of
          *           a low quality RNG initially, as long as it improves should a hash table be under attack:
-         *           the attacker after all needs to to trigger many collisions to exploit it for the purpose
+         *           the attacker after all needs to trigger many collisions to exploit it for the purpose
          *           of DoS, but if doing so improves the seed the attack surface is reduced as the attack
          *           takes place.
          *

src/basic/socket-util.c

@@ -105,7 +105,7 @@ int socket_address_verify(const SocketAddress *a, bool strict) {
                                 if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1)
                                         return -EINVAL;
                         } else {
-                                /* If there's no embedded NUL byte, then then the size needs to match the whole
+                                /* If there's no embedded NUL byte, then the size needs to match the whole
                                  * structure or the structure with one extra NUL byte suffixed. (Yeah, Linux is awful,
                                  * and considers both equivalent: getsockname() even extends sockaddr_un beyond its
                                  * size if the path is non NUL terminated.)*/