docs: fix capitalization in doxygen comments

Change-Id: Ibf5ee5119d12d60d382b0acef8dfd08277c18fcb
diff --git a/daemon/face/lp-fragmenter.hpp b/daemon/face/lp-fragmenter.hpp
index 8d24124..40e429b 100644
--- a/daemon/face/lp-fragmenter.hpp
+++ b/daemon/face/lp-fragmenter.hpp
@@ -32,17 +32,17 @@
 
 namespace nfd::face {
 
-/** \brief fragments network-layer packets into NDNLPv2 link-layer packets
+/** \brief Fragments network-layer packets into NDNLPv2 link-layer packets.
  *  \sa https://redmine.named-data.net/projects/nfd/wiki/NDNLPv2
  */
 class LpFragmenter
 {
 public:
-  /** \brief Options that control the behavior of LpFragmenter
+  /** \brief %Options that control the behavior of LpFragmenter.
    */
   struct Options
   {
-    /** \brief maximum number of fragments in a packet
+    /** \brief Maximum number of fragments in a packet.
      */
     size_t nMaxFragments = 400;
   };
@@ -50,7 +50,7 @@
   explicit
   LpFragmenter(const Options& options, const LinkService* linkService = nullptr);
 
-  /** \brief set options for fragmenter
+  /** \brief Set options for fragmenter.
    */
   void
   setOptions(const Options& options);
@@ -62,7 +62,7 @@
   const LinkService*
   getLinkService() const;
 
-  /** \brief fragments a network-layer packet into link-layer packets
+  /** \brief Fragments a network-layer packet into link-layer packets.
    *  \param packet an LpPacket that contains a network-layer packet;
    *                must have Fragment field, must not have FragIndex and FragCount fields
    *  \param mtu maximum allowable LpPacket size after fragmentation and sequence number assignment