update .gitignore to match new man page locations

Signed-off-by: Steven Armstrong <steven@icarus.ethz.ch>

.gitignore

@@ -3,7 +3,12 @@
 
 # Ignore generated manpages
 doc/man/.marker
-doc/man/man*/
+doc/man/man*/*.1
+doc/man/man*/*.7
+doc/man/man*/*.html
+doc/man/man*/*.xml
+# Ignore type manpages
+doc/man/man*/*__*.text
 
 # Ignore cache for version control
 cache/