Fix a bunch of typos (#2693)

fix a bunch of types in man pages, docs, tools, tests, src and examples.
diff --git a/tools/tcpstates.py b/tools/tcpstates.py
index 3c78b1c..b9a6438 100755
--- a/tools/tcpstates.py
+++ b/tools/tcpstates.py
@@ -28,7 +28,7 @@
     ./tcpstates           # trace all TCP state changes
     ./tcpstates -t        # include timestamp column
     ./tcpstates -T        # include time column (HH:MM:SS)
-    ./tcpstates -w        # wider colums (fit IPv6)
+    ./tcpstates -w        # wider columns (fit IPv6)
     ./tcpstates -stT      # csv output, with times & timestamps
     ./tcpstates -Y        # log events to the systemd journal
     ./tcpstates -L 80     # only trace local port 80