shurly 6.x-1.2

Changes since 6.x-1.1

#2332045 by MrHaroldA: fixed notice in shurly_validate_long()
#1834566 by rnyberg: define base url for shurly
#1142786 by Beanjammin: extend views support to the shurly_keys table
#1768672 by Jibus: PostgreSQL support
#1961232 by Alex Savin: Shurly table optimisation
#2259339 by pmichelazzo: strict warning issue
#2152627 by hiroshisan: increase the size of the destination field
#2139931 by Hroudtwolf: add comments
#1778558 by makangus: strict warning issue
#1805988 by Jibus: add a default value to the Last used in the view shurly_my_urls

This release includes database updates (increase the lenght of the destination field and the source field is now binary). Don't hesitate to make a backup before applying the update. The database updates are mandatory. The 6.x-1.2 version of Shurly won't work correctly if you don't apply the updates.