Fix some typos

[skip ci]

Author: fxlb

CHANGES

@@ -460,7 +460,7 @@ Sunday, June 24, 2018, by [email protected]
     Added testing system to libpcap, independent of tcpdump
     Changes to how pcap_t is activated
     Adding support for Large stream buffers on Endace DAG cards
-    Changes to BSD 3-clause license to 2-clause licence
+    Changes to BSD 3-clause license to 2-clause license
     Additions to TCP header parsing, per RFC3168
     Add CMake build process (extensive number of changes)
     Assign a value for OpenBSD DLT_OPENFLOW.

configure

@@ -6782,7 +6782,7 @@ fi
 		# This test fails if we don't have <arpa/inet.h>
 		# (if we have ether_hostton(), we should have
 		# networking, and if we have networking, we should
-		# have <arapa/inet.h>) or if we do but it doesn't
+		# have <arpa/inet.h>) or if we do but it doesn't
 		# declare ether_hostton().
 		#
 		# Unset ac_cv_have_decl_ether_hostton so we don't

configure.ac

@@ -454,7 +454,7 @@ if test "$ac_cv_func_ether_hostton" = yes; then
 		# This test fails if we don't have <arpa/inet.h>
 		# (if we have ether_hostton(), we should have
 		# networking, and if we have networking, we should
-		# have <arapa/inet.h>) or if we do but it doesn't
+		# have <arpa/inet.h>) or if we do but it doesn't
 		# declare ether_hostton().
 		#
 		# Unset ac_cv_have_decl_ether_hostton so we don't