Spelling fixes

Spelling errors found using github.com/lucasdemarchi/codespell
A tool to fix common misspellings.
This tool is licensed under GNU General Public License, version 2.

Change-Id: I2a2cf8b85dc24b4f109e05ed176d1e24bc8717cc
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index 80e651e..5ff03f1 100755
--- a/configure.ac
+++ b/configure.ac
@@ -16,7 +16,7 @@
 PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221])
 
 # Checks for header files.
-AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd developement package required])])
+AC_CHECK_HEADER(systemd/sd-bus.h, ,[AC_MSG_ERROR([Could not find systemd/sd-bus.h...systemd development package required])])
 # Checks for typedefs, structures, and compiler characteristics.
 
 AC_ARG_VAR(SERVICE_DIR, [Location of service files.])
diff --git a/slp.hpp b/slp.hpp
index d0df089..fa8aad6 100644
--- a/slp.hpp
+++ b/slp.hpp
@@ -121,7 +121,7 @@
 
 
 /*
- * @struct Messsage
+ * @struct Message
  *
  * This will denote the slp Message.
  */
diff --git a/slp_message_handler.cpp b/slp_message_handler.cpp
index 7d88347..5125b29 100644
--- a/slp_message_handler.cpp
+++ b/slp_message_handler.cpp
@@ -222,7 +222,7 @@
 
     //Find the service
     const slp::ConfigData& svc = svcIt->second;
-    //Populate the URL Entrys
+    //Populate the URL Entries
     auto pos = slp::response::OFFSET_URL_ENTRY + slp::response::SIZE_URL_COUNT;
     for (const auto& addr : ifaddrList)
     {