Doc: README and INSTALL update

Minor cleanups, updates and clarifications. Also removes (incomplete
and well-known) build steps from README, as they are better described
in INSTALL.

1 files changed, 11 insertions, 3 deletions

diff --git a/INSTALL b/INSTALL
index a0b107ef..7bb8ded9 100644
--- a/INSTALL
+++ b/INSTALL
@@ -7,13 +7,15 @@ $ make
 
 Default location for configuration file is /usr/local/etc/bird.conf and
 for control socket is /usr/local/var/run/bird.ctl . You can change that
-by --sysconfdir and --localstatedir configure options.
+by --prefix, --sysconfdir and --runstatedir configure options, e.g.:
+
+$ ./configure --prefix=/usr --sysconfdir=/etc --runstatedir=/run
 
 To compile current development BIRD source code from Git repository, you
 also need Git (to download the source code) and Autoconf (to generate
 the configure script and associated files using 'autoreconf' tool):
 
-$ git clone git://git.nic.cz/bird.git
+$ git clone https://gitlab.labs.nic.cz/labs/bird/
 $ cd bird
 $ autoreconf
 
@@ -32,9 +34,15 @@ For compiling BIRD you need these programs and libraries:
  - Flex
 
  - ncurses library
- - GNU Readline library (2.1 or newer)
+ - GNU Readline library
+ - libssh library (optional, for RPKI-Router protocol)
 
 For compiling BIRD documentation you also need:
 
  - Linuxdoc-Tools
  - LaTeX
+
+Note that build scripts for BIRD documentation expects 'nsgmls' from
+James Clark's SP suite, while modern distributions use 'onsgmls' from
+OpenSP suite. It is possible to build BIRD documentation with OpenSP
+tools, but it requires manually tweaking paths in doc/sgml2* scripts.