More care was needed to the case of editline(3).
Base on r45240 in Ruby's repository with one critical correction.
Fix PR pkg/48682, fix build under NetBSD/i386 5.2.
Update to 2.25

* Change enigmail build mechanism

Changelog:
2.25:
SeaMonkey-specific changes

    Newsgroup names can now be entered using autocompletion.
    See the changes page for a more complete overview.

Mozilla platform changes

    The Gamepad API has been finalized and enabled (learn more).
    VP9 video decoding has been implemented.
    Support for Opus in WebM was added.
    Volume control for HTML5 audio/video has been added.
    Mac OS X Notification Center support has been added for web notifications.
    Support for spdy/2 has been removed.
    Support for multi-line flexbox in layout has been added.
    Support for the MathML 2.0 mathvariant attribute has been added.
    Background thread hang reporting has been added.
    <input type=color> has been implemented and enabled.
    Fixed several stability issues.

Fixed in SeaMonkey 2.25
MFSA 2014-32 Out-of-bounds write through TypedArrayObject after neutering
MFSA 2014-31 Out-of-bounds read/write through neutering ArrayBuffer objects
MFSA 2014-30 Use-after-free in TypeObject
MFSA 2014-29 Privilege escalation using WebIDL-implemented APIs
MFSA 2014-28 SVG filters information disclosure through feDisplacementMap
MFSA 2014-27 Memory corruption in Cairo during PDF font rendering
MFSA 2014-26 Information disclosure through polygon rendering in MathML
MFSA 2014-23 Content Security Policy for data: documents not preserved by session restore
MFSA 2014-22 WebGL content injection from one domain to rendering in another
MFSA 2014-20 onbeforeunload and Javascript navigation DOS
MFSA 2014-19 Spoofing attack on WebRTC permission prompt
MFSA 2014-18 crypto.generateCRMFRequest does not validate type of key
MFSA 2014-17 Out of bounds read during WAV file decoding
MFSA 2014-16 Files extracted during updates are not always read only
MFSA 2014-15 Miscellaneous memory safety hazards (rv:28.0 / rv:24.4)

2.24:
SeaMonkey-specific changes

    The DoNotTrack and Prompt on Sanitize preferences are now kept in sync.
    A pref (mailnews.p7m_external) has been added to allow users to choose an alternate application/pkcs7-mime handling.
    Support for Atom Threading Extensions (RFC 4685) has been added.
    Migrating profiles from Thunderbird supports the new signons file format now (support for the old format has been dropped).
    Autocomplete drop-downs (e.g. used on the Location Bar and Open Location dialog) now show favicons for their entries.
    The account name is now displayed in the status bar for all messages when checking mail.
    IMAP alert messages now show the server of the corresponding mail account.
    Newsgroup names are now searched for all search strings combined (AND-search) on the subscribe dialog.
    See the changes page for a more complete overview.

Mozilla platform changes

    Removed support for importing logins from the legacy signons.txt format, including the Base64 conversion (bug 717490).
    Enabled support for TLS 1.2 (RFC 5246) by default (bug 861266).
    Added support for the SPDY 3.1 protocol.
    Added ability to reset style sheets using all:unset.
    Added support for scrolled fieldsets (overflow property support, bug 261037).
    Implemented allow-popups directive for iframe sandbox, enabling increased security (bug 766282).
    Unprefixed CSS cursor keywords -moz-grab and -moz-grabbing (bug 880672).
    Added support for ES6 generators in SpiderMonkey (blog post).
    Implemented support for mathematical function Math.hypot() in ES6 (bug 896264).
    Added dashed line support on Canvas (bug 768067).
    Fixed Azure/Skia content rendering on Linux (bug 740200).
    Fixed several stability issues.

Fixed in SeaMonkey 2.24
MFSA 2014-13 Inconsistent JavaScript handling of access to Window objects
MFSA 2014-12 NSS ticket handling issues
MFSA 2014-11 Crash when using web workers with asm.js
MFSA 2014-09 Cross-origin information leak through web workers
MFSA 2014-08 Use-after-free with imgRequestProxy and image proccessing
MFSA 2014-07 XSLT stylesheets treated as styles in Content Security Policy
MFSA 2014-05 Information disclosure with *FromPoint on iframes
MFSA 2014-04 Incorrect use of discarded images by RasterImage
MFSA 2014-03 UI selection timeout missing on download prompts
MFSA 2014-02 Clone protected content with XBL scopes
MFSA 2014-01 Miscellaneous memory safety hazards (rv:27.0 / rv:24.3)
Updated www/seamonkey to 2.25
Update to 2.25

Changelog:
* Sync with seamonkey-2.25
Updated www/seamonkey-l10n to 2.25