README.md: Make sure all hyperlinks use <>

Change-Id: Iebc3f9b60004b4c17f0a35b90c2b226a8f357a10
diff --git a/README.md b/README.md
index 5c0e8af..2bca502 100644
--- a/README.md
+++ b/README.md
@@ -15,9 +15,9 @@
 --------
 
 The official homepage of the Osmocom version of the library is
-http://osmocom.org/projects/libsmpp34
+<http://osmocom.org/projects/libsmpp34>
 while the original upstream project is found at
-https://sourceforge.net/projects/c-open-smpp-34/
+<https://sourceforge.net/projects/c-open-smpp-34/>
 
 GIT Repository
 --------------
@@ -26,14 +26,14 @@
 
 	git clone git://git.osmocom.org/libsmpp34.git
 
-There is a cgit interface at http://git.osmocom.org/libsmpp34/
+There is a cgit interface at <http://git.osmocom.org/libsmpp34/>
 
 Documentation
 -------------
 
 API documentation is generated during the build
 process, but also available online from the upstream project at
-http://c-open-smpp-34.sourceforge.net/out-1.10/web/c-open-libsmpp34_en/index.html
+<http://c-open-smpp-34.sourceforge.net/out-1.10/web/c-open-libsmpp34_en/index.html>
 
 Mailing List
 ------------
@@ -51,12 +51,12 @@
 ------------
 
 Our coding standards are described at
-https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards
+<https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards>
 
 We us a gerrit based patch submission/review process for managing
 contributions.  Please see
-https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for
+<https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit> for
 more details
 
 The current patch queue for libosmocore can be seen at
-https://gerrit.osmocom.org/#/q/project:libsmpp34+status:open
+<https://gerrit.osmocom.org/#/q/project:libsmpp34+status:open>