clean up URLs

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43221 15284696-431f-4ddb-bdfa-cd5b030d7da7

REQUIREMENTS.html

@@ -34,8 +34,7 @@ to install some of them.)
 
 <li><b>zlib</b> compression library (already installed on most modern systems)
 <br>It is used to internally compress GRASS raster maps:
-<br>libz: <a href="http://www.gzip.org/zlib/">http://www.gzip.org/zlib</a>
-<!-- freesoftware.com is broken! <br><a href="ftp://ftp.freesoftware.com/pub/infozip/zlib/">ftp://ftp.freesoftware.com/pub/infozip/zlib</a> -->
+<br>libz: <a href="http://www.zlib.net">http://www.zlib.net</a>
 <br>
 
 <li><b>flex</b> lexical analyzer generator (flex) - note: lex is no longer supported, please use flex instead:
@@ -60,12 +59,12 @@ construction which does not require X11
 <br>
 
 <li><b>PROJ4</b> - Projection Library<br>
-<a href="http://proj.maptools.org">http://proj.maptools.org</a>
+<a href="http://trac.osgeo.org/proj">http://trac.osgeo.org/proj</a>
 <br>
 
 <li><b>GDAL and OGR</b> for import and export of most external raster and vector
 map formats<br>
-<a href="http://www.gdal.org">http://www.gdal.org</a>
+<a href="http://gdal.osgeo.org">http://gdal.osgeo.org</a>
 
 </ul>
 
@@ -96,11 +95,11 @@ for i.fft and i.ifft and other modules<br>
 
 <li><b>GEOS 3.x(?)</b> (Geometry Engine library), adds extended options
 to the v.select module<br>
-<a href="http://trac.osgeo.org/geos/">http://trac.osgeo.org/geos/</a>
+<a href="http://trac.osgeo.org/geos">http://trac.osgeo.org/geos</a>
 
 
 <li><b>LAPACK / BLAS</b> (libraries for numerical computing) for GMATH library (GRASS numerical lib)<br>
-[<a href="http://www.netlib.org/lapack/">http://www.netlib.org/lapack</a>] (usually available on Linux distros)
+<a href="http://www.netlib.org/lapack">http://www.netlib.org/lapack</a> (usually available on Linux distros)
 <br>
 <I>Note: LAPACK/BLAS support is intended for future module implementations, no need to
 use it at time!</I>
@@ -112,16 +111,16 @@ use it at time!</I>
 
 <li><b>libjpeg</b> (for r.out.tiff), usually already installed.<br>
 <a href="http://www.ijg.org">http://www.ijg.org</a><br>
-<a href="ftp://ftp.uu.net/graphics/jpeg/">ftp://ftp.uu.net/graphics/jpeg</a>
+<a href="ftp://ftp.uu.net/graphics/jpeg">ftp://ftp.uu.net/graphics/jpeg</a>
 
 
 <li><b>libtiff</b> (for r.out.tiff), usually already installed.<br>
-<a href="http://www.remotesensing.org/libtiff/">http://www.remotesensing.org/libtiff/</a>
+<a href="http://www.remotesensing.org/libtiff">http://www.remotesensing.org/libtiff</a>
 
 
 <li><b>readline</b> for extra command prompt functionality
 <br><a href="http://tiswww.case.edu/~chet/readline/rltop.html">http://tiswww.case.edu/~chet/readline/rltop.html</a>
-<br><a href="ftp://ftp.gnu.org/gnu/readline/">ftp://ftp.gnu.org/gnu/readline/</a>
+<br><a href="ftp://ftp.gnu.org/gnu/readline">ftp://ftp.gnu.org/gnu/readline</a>
 
 <li><b>PostgreSQL libraries</b> (for the PostgreSQL database interface)<br>
 <a href="http://www.postgresql.org">http://www.postgresql.org</a>
@@ -152,7 +151,7 @@ module)<br>
 <a href="http://www.freetype.org">http://www.freetype.org</a>
 
 
-<li><b>Python >= 2.4</b> (for wxGUI and ctypes interface)<br>
+<li><b>Python &gt;= 2.4</b> (for wxGUI and ctypes interface)<br>
 Note: Python 3 is not supported<br>
 <a href="http://www.python.org">http://www.python.org</a>
 
@@ -161,7 +160,7 @@ Ctypes can be added as a third-party module in Python 2.3 and 2.4
 - <a href="http://pypi.python.org/pypi/ctypes/1.0.2">http://pypi.python.org/pypi/ctypes/1.0.2</a><br>
 <a href="http://docs.python.org/library/ctypes.html">http://docs.python.org/library/ctypes.html</a>
 
-<li><b>wxPython >= 2.8.1.1</b> (for wxGUI, see file
+<li><b>wxPython &gt;= 2.8.1.1</b> (for wxGUI, see file
 gui/wxpython/README)<br>
 <a href="http://www.wxpython.org">http://www.wxpython.org</a>
 
@@ -173,15 +172,15 @@ gui/wxpython/README)<br>
 
 <li><b>FFMPEG</b> (for direct rendering of animations from NVIZ),
     including libavcodec, libavformat, libswscale <BR>
-<a href="http://ffmpeg.mplayerhq.hu/">http://ffmpeg.mplayerhq.hu</a><BR>
+<a href="http://ffmpeg.mplayerhq.hu">http://ffmpeg.mplayerhq.hu</a><BR>
 
 
-<li><b>Cairo</b> (Cairo graphics library, Version &gt;= 1.5.8)<BR>
+<li><b>Cairo &gt;= 1.5.8</b> (Cairo graphics library<BR>
 <a href="http://cairographics.org">http://cairographics.org</a><BR>
 
 
 <li><b>AVCE00 and E00Compr Libraries</b> (avcimport)<BR>
-<a href="http://avce00.maptools.org/">http://avce00.maptools.org/</a><BR>
+<a href="http://avce00.maptools.org">http://avce00.maptools.org</a><BR>
 
 </ul>