Added support for pgettext() and npgettext() to separate contexts for translatable messages that are going to be ambiguous in English original.

scripts/update_pot.sh

@@ -1,3 +1,14 @@
 cd `dirname $0`
 cd ..
-xgettext --from-code=UTF-8 --default-domain=statusnet --output=locale/statusnet.po --language=PHP --join-existing actions/*.php classes/*.php lib/*.php scripts/*.php
+xgettext \
+    --from-code=UTF-8 \
+    --default-domain=statusnet \
+    --output=locale/statusnet.po \
+    --language=PHP \
+    --keyword="pgettext:1c,2" \
+    --keyword="npgettext:1c,2,3" \
+    --join-existing \
+    actions/*.php \
+    classes/*.php \
+    lib/*.php \
+    scripts/*.php